chore: migrate GRACE-Poly anchors to hierarchical dotted naming

Systematic rename of all semantic anchors (#region, [DEF], @RELATION)
across 1400+ files — backend Python, frontend Svelte/TS, specs, docs:
- Flat anchors become Namespace.Module.Entity
- @RELATION references updated to match new anchor paths
- Zero business logic changes

backend/tests/test_api_key_model.py

@@ -1,6 +1,6 @@
-# #region TestAPIKeyModel [C:2] [TYPE Module] [SEMANTICS test, api_key, model]
+# #region Test.ApiKeyModel.TestAPIKeyModel [C:2] [TYPE Module] [SEMANTICS test, api_key, model]
 # @BRIEF Contract tests for the APIKey SQLAlchemy model — creation, hash storage, and field constraints.
-# @RELATION BINDS_TO -> [APIKeyModel]
+# @RELATION BINDS_TO -> [Models.ApiKey.APIKeyModel]
 # @TEST_CONTRACT: APIKey model stores SHA-256 hash and prefix; raw key never persisted.
 # @TEST_EDGE: key_hash is unique and indexed
 # @TEST_EDGE: prefix is exactly 11 chars ("ssk_" + 7)
@@ -8,7 +8,7 @@
 import pytest
 
 
-# #region clean_db [C:1] [TYPE Fixture]
+# #region Test.ApiKeyModel.CleanDb [C:1] [TYPE Fixture]
 # @BRIEF In-memory SQLite fixture for APIKey model tests.
 @pytest.fixture
 def clean_db():
@@ -28,13 +28,13 @@ def clean_db():
     session = Session()
     yield session
     session.close()
-# #endregion clean_db
+# #endregion Test.ApiKeyModel.CleanDb
 
 
 class TestAPIKeyModel:
     """Verify APIKey model fields and constraints."""
 
-    # #region test_create_api_key [C:2] [TYPE Function]
+    # #region Test.ApiKeyModel.TestCreateApiKey [C:2] [TYPE Function]
     # @BRIEF Create APIKey with required fields and verify defaults.
     def test_create_api_key(self, clean_db):
         from src.models.api_key import APIKey
@@ -59,9 +59,9 @@ class TestAPIKeyModel:
         assert api_key.environment_id is None
         assert api_key.expires_at is None
         assert api_key.last_used_at is None
-    # #endregion test_create_api_key
+    # #endregion Test.ApiKeyModel.TestCreateApiKey
 
-    # #region test_key_hash_unique [C:2] [TYPE Function]
+    # #region Test.ApiKeyModel.TestKeyHashUnique [C:2] [TYPE Function]
     # @BRIEF key_hash is unique — duplicate raises IntegrityError.
     def test_key_hash_unique(self, clean_db):
         from sqlalchemy.exc import IntegrityError
@@ -84,9 +84,9 @@ class TestAPIKeyModel:
                 permissions=["maintenance:end"],
             ))
             clean_db.commit()
-    # #endregion test_key_hash_unique
+    # #endregion Test.ApiKeyModel.TestKeyHashUnique
 
-    # #region test_prefix_length [C:2] [TYPE Function]
+    # #region Test.ApiKeyModel.TestPrefixLength [C:2] [TYPE Function]
     # @BRIEF prefix is exactly 11 characters.
     def test_prefix_length(self, clean_db):
         from src.models.api_key import APIKey
@@ -102,9 +102,9 @@ class TestAPIKeyModel:
         # The DB allows any prefix length; the app layer enforces 11 chars
         # via generate_api_key. Model just stores what it's given.
         assert len(api_key.prefix) <= 11
-    # #endregion test_prefix_length
+    # #endregion Test.ApiKeyModel.TestPrefixLength
 
-    # #region test_active_default_true [C:2] [TYPE Function]
+    # #region Test.ApiKeyModel.TestActiveDefaultTrue [C:2] [TYPE Function]
     # @BRIEF active column defaults to True.
     def test_active_default_true(self, clean_db):
         from src.models.api_key import APIKey
@@ -119,5 +119,5 @@ class TestAPIKeyModel:
         clean_db.commit()
 
         assert api_key.active is True
-    # #endregion test_active_default_true
-# #endregion TestAPIKeyModel
+    # #endregion Test.ApiKeyModel.TestActiveDefaultTrue
+# #endregion Test.ApiKeyModel.TestAPIKeyModel