refactor(semantics): migrate legacy @TIER to @COMPLEXITY annotations

- Replaced @TIER: TRIVIAL with @COMPLEXITY: 1
- Replaced @TIER: STANDARD with @COMPLEXITY: 3
- Replaced @TIER: CRITICAL with @COMPLEXITY: 5
- Manually elevated specific critical/complex components to levels 2 and 4
- Ignored legacy, specs, and node_modules directories
- Updated generated semantic map

backend/src/api/routes/storage.py

@@ -1,6 +1,6 @@
 # [DEF:storage_routes:Module]
 #
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: storage, files, upload, download, backup, repository
 # @PURPOSE:   API endpoints for file storage management (backups and repositories).
 # @LAYER:     API
@@ -22,7 +22,7 @@ from ...core.logger import belief_scope
 router = APIRouter(tags=["storage"])
 
 # [DEF:list_files:Function]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE:     List all files and directories in the storage system.
 #
 # @PRE:         None.
@@ -49,7 +49,7 @@ async def list_files(
 # [/DEF:list_files:Function]
 
 # [DEF:upload_file:Function]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE:     Upload a file to the storage system.
 #
 # @PRE:         category must be a valid FileCategory.
@@ -83,7 +83,7 @@ async def upload_file(
 # [/DEF:upload_file:Function]
 
 # [DEF:delete_file:Function]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE:     Delete a specific file or directory.
 #
 # @PRE:         category must be a valid FileCategory.
@@ -116,7 +116,7 @@ async def delete_file(
 # [/DEF:delete_file:Function]
 
 # [DEF:download_file:Function]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE:     Retrieve a file for download.
 #
 # @PRE:         category must be a valid FileCategory.
@@ -149,7 +149,7 @@ async def download_file(
 # [/DEF:download_file:Function]
 
 # [DEF:get_file_by_path:Function]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Retrieve a file by validated absolute/relative path under storage root.
 #
 # @PRE: path must resolve under configured storage root.