(refactor) Normalize maintainer command labels

Prefer --schedule-expression for scripted schedule updates while keeping
--cron as a compatibility alias.

Clean up management command help, errors, and output so operator-facing
text talks about hosts, global config, and Django backup configuration
instead of model names or old SQL-backed pobsync wording.

docs/development.md

@@ -70,7 +70,7 @@ automation/debugging path rather than the normal UI workflow:
 
 ```
 pobsync django configure_pobsync_host <host> --address <host.example>
-pobsync django configure_pobsync_schedule <host> --cron "15 2 * * *"
+pobsync django configure_pobsync_schedule <host> --schedule-expression "15 2 * * *"
 ```
 
 ## Installer Development

src/pobsync_backend/management/commands/configure_pobsync_global.py

@@ -11,7 +11,7 @@ from pobsync_backend.models import GlobalConfig
 
 
 class Command(BaseCommand):
-    help = "Create or update the SQL-backed global pobsync configuration."
+    help = "Create or update the default global backup configuration."
 
     def add_arguments(self, parser) -> None:
         parser.add_argument("--name", default="default")
@@ -48,8 +48,8 @@ class Command(BaseCommand):
         }
 
         if GlobalConfig.objects.filter(name=options["name"]).exists() and not options["force"]:
-            raise CommandError(f"GlobalConfig {options['name']!r} already exists; use --force to update")
+            raise CommandError(f"Global config {options['name']!r} already exists; use --force to update")
 
         _obj, created = GlobalConfig.objects.update_or_create(name=options["name"], defaults=defaults)
         action = "Created" if created else "Updated"
-        self.stdout.write(self.style.SUCCESS(f"{action} GlobalConfig {options['name']!r}."))
+        self.stdout.write(self.style.SUCCESS(f"{action} global config {options['name']!r}."))

src/pobsync_backend/management/commands/configure_pobsync_host.py

@@ -10,7 +10,7 @@ from pobsync_backend.models import GlobalConfig, HostConfig
 
 
 class Command(BaseCommand):
-    help = "Create or update a SQL-backed host pobsync configuration."
+    help = "Create or update a host backup configuration."
 
     def add_arguments(self, parser) -> None:
         parser.add_argument("host")
@@ -29,7 +29,7 @@ class Command(BaseCommand):
     def handle(self, *args: Any, **options: Any) -> None:
         host = sanitize_host(options["host"])
         if HostConfig.objects.filter(host=host).exists() and not options["force"]:
-            raise CommandError(f"HostConfig {host!r} already exists; use --force to update")
+            raise CommandError(f"Host {host!r} already exists; use --force to update")
 
         retention = self._retention(options["retention"])
         defaults = {
@@ -49,7 +49,7 @@ class Command(BaseCommand):
         }
         _obj, created = HostConfig.objects.update_or_create(host=host, defaults=defaults)
         action = "Created" if created else "Updated"
-        self.stdout.write(self.style.SUCCESS(f"{action} HostConfig {host!r}."))
+        self.stdout.write(self.style.SUCCESS(f"{action} host {host!r}."))
 
     def _retention(self, value: str | None) -> dict[str, int]:
         if value:

src/pobsync_backend/management/commands/configure_pobsync_schedule.py

@@ -9,11 +9,16 @@ from pobsync_backend.scheduler import parse_cron_expr
 
 
 class Command(BaseCommand):
-    help = "Create, update, disable, or remove a SQL-backed pobsync schedule."
+    help = "Create, update, disable, or remove a scheduler-managed host schedule."
 
     def add_arguments(self, parser) -> None:
         parser.add_argument("host")
-        parser.add_argument("--cron", help='Cron expression, e.g. "15 2 * * *"')
+        parser.add_argument(
+            "--schedule-expression",
+            "--cron",
+            dest="schedule_expression",
+            help='Five-field schedule expression, e.g. "15 2 * * *"',
+        )
         parser.add_argument("--prune", action="store_true")
         parser.add_argument("--prune-max-delete", type=int, default=10)
         parser.add_argument("--prune-protect-bases", action="store_true")
@@ -24,24 +29,25 @@ class Command(BaseCommand):
         try:
             host = HostConfig.objects.get(host=options["host"])
         except HostConfig.DoesNotExist as exc:
-            raise CommandError(f"Missing HostConfig {options['host']!r}") from exc
+            raise CommandError(f"Missing host {options['host']!r}") from exc
 
         if options["delete"]:
             deleted, _details = ScheduleConfig.objects.filter(host=host).delete()
             self.stdout.write(self.style.SUCCESS(f"Deleted {deleted} schedule row(s) for {host.host!r}."))
             return
 
-        if not options["cron"]:
-            raise CommandError("--cron is required unless --delete is used")
+        schedule_expression = options["schedule_expression"]
+        if not schedule_expression:
+            raise CommandError("--schedule-expression is required unless --delete is used")
         try:
-            parse_cron_expr(options["cron"])
+            parse_cron_expr(schedule_expression)
         except ValueError as exc:
             raise CommandError(str(exc)) from exc
 
         schedule, created = ScheduleConfig.objects.update_or_create(
             host=host,
             defaults={
-                "cron_expr": options["cron"],
+                "cron_expr": schedule_expression,
                 "enabled": not options["disabled"],
                 "prune": bool(options["prune"]),
                 "prune_max_delete": int(options["prune_max_delete"]),

src/pobsync_backend/management/commands/discover_pobsync_snapshots.py

@@ -20,14 +20,14 @@ class Command(BaseCommand):
         try:
             global_config = GlobalConfig.objects.get(name="default")
         except GlobalConfig.DoesNotExist as exc:
-            raise CommandError("Missing GlobalConfig 'default'") from exc
+            raise CommandError("Missing default global config") from exc
 
         host = None
         if options["host"]:
             try:
                 host = HostConfig.objects.get(host=options["host"], enabled=True)
             except HostConfig.DoesNotExist as exc:
-                raise CommandError(f"Missing enabled HostConfig {options['host']!r}") from exc
+                raise CommandError(f"Missing enabled host {options['host']!r}") from exc
 
         kind = normalize_kind(options["kind"])
         kinds = ["scheduled", "manual", "incomplete"] if kind == "all" else [kind]

src/pobsync_backend/management/commands/run_pobsync_backup.py

@@ -30,7 +30,7 @@ class Command(BaseCommand):
         try:
             host = HostConfig.objects.get(host=host_name, enabled=True)
         except HostConfig.DoesNotExist as exc:
-            raise CommandError(f"Missing enabled HostConfig {host_name!r}") from exc
+            raise CommandError(f"Missing enabled host {host_name!r}") from exc
 
         run = BackupRun.objects.create(
             host=host,

src/pobsync_backend/management/commands/run_pobsync_retention.py

@@ -12,7 +12,7 @@ from pobsync_backend.retention import run_sql_retention_apply, run_sql_retention
 
 
 class Command(BaseCommand):
-    help = "Plan or apply retention using SQL-backed pobsync configuration."
+    help = "Plan or apply retention using the Django backup configuration."
 
     def add_arguments(self, parser) -> None:
         parser.add_argument("host")

src/pobsync_backend/tests/test_configure_commands.py

@@ -23,7 +23,7 @@ class ConfigureCommandsTests(TestCase):
         config = GlobalConfig.objects.get(name="default")
         self.assertEqual(config.backup_root, "/backups")
         self.assertEqual(config.retention_daily, 3)
-        self.assertIn("Created GlobalConfig", out.getvalue())
+        self.assertIn("Created global config", out.getvalue())
 
     def test_configure_host_uses_global_retention_defaults(self) -> None:
         GlobalConfig.objects.create(
@@ -61,7 +61,7 @@ class ConfigureCommandsTests(TestCase):
         call_command(
             "configure_pobsync_schedule",
             host.host,
-            cron="15 2 * * *",
+            schedule_expression="15 2 * * *",
             prune=True,
             stdout=out,
         )