feat(ECR-040): ExploreConfig ScaleDefinition 只读投影并 Closed

复用 scales 表只读投影；admin-h5 /catalogs 聚合 026–040 目录；Loop 队列 STOP。

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/CONTRACT_DIFF/ECR-040.yaml

@@ -0,0 +1,23 @@
+ecr: ECR-040
+capability: ExploreConfig
+bounded_context: Explore_Reports
+parent: WAVE0-FROZEN
+predecessor: ECR-039
+change:
+  type: additive
+breaking_change: false
+migration_required: false
+compatibility_notes: >
+  Adds ScaleDefinition read projection over existing scales table.
+  Requires admin.explore.read. Does not add PATCH.
+
+apis:
+  - method: GET
+    path: /api/v1/admin/explore/scales
+    change: added
+  - method: GET
+    path: /api/v1/admin/explore/scales/{id}
+    change: added
+perms:
+  - code: admin.explore.read
+    change: unchanged