fix(migrations): 0035's revision id fits alembic_version (32 chars) (#5374)

"0035_drop_plugin_catalog_settings" is 33 characters, and
alembic_version.version_num is VARCHAR(32), so the upgrade failed with
"value too long" (CI run 8800, integration). Renamed to
0035_drop_plugin_catalog. tests/test_migration_ids.py now checks every core
and plugin revision id fits, in the unit lane, which never migrates.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

steward/migrations/versions/0035_drop_plugin_catalog.py

@@ -5,7 +5,7 @@ image and a third-party plugin is a folder the operator mounts, so nothing reads
 `plugins.index_url` or `plugins.repositories` any more. The removed feature
 takes its rows with it, as 0025 did for the http plugin.
 
-Revision ID: 0035_drop_plugin_catalog_settings
+Revision ID: 0035_drop_plugin_catalog
 Revises: 0034_user_time_zone
 Create Date: 2026-10-08
 """
@@ -13,7 +13,7 @@ from typing import Sequence, Union
 from alembic import op
 import sqlalchemy as sa
 
-revision: str = "0035_drop_plugin_catalog_settings"
+revision: str = "0035_drop_plugin_catalog"
 down_revision: Union[str, None] = "0034_user_time_zone"
 branch_labels: Union[str, Sequence[str], None] = None
 depends_on: Union[str, Sequence[str], None] = None

tests/test_migration_ids.py

@@ -0,0 +1,29 @@
+"""Every Alembic revision id fits alembic_version.version_num, a VARCHAR(32).
+
+A longer id passes every unit test and fails only when the upgrade writes it:
+"value too long for type character varying(32)", and the app does not boot
+(0035, #5374). The unit lane never migrates, so this reads the files.
+"""
+import pathlib
+import re
+
+REPO = pathlib.Path(__file__).resolve().parents[1]
+_REVISION = re.compile(r'^revision(?::[^=]*)?=\s*["\']([^"\']+)["\']', re.M)
+
+
+def revision_ids() -> dict[str, str]:
+    files = [*(REPO / "steward/migrations/versions").glob("*.py"),
+             *(REPO / "plugins").glob("*/migrations/versions/*.py")]
+    found = {}
+    for path in files:
+        m = _REVISION.search(path.read_text())
+        if m:
+            found[str(path.relative_to(REPO))] = m.group(1)
+    return found
+
+
+def test_every_revision_id_fits_version_num():
+    ids = revision_ids()
+    assert len(ids) >= 30, ids  # core and plugin migrations were found, so the check is real
+    too_long = {path: rev for path, rev in ids.items() if len(rev) > 32}
+    assert not too_long, f"alembic_version.version_num is VARCHAR(32): {too_long}"