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/services/profile_service.py

@@ -1,6 +1,6 @@
 # [DEF:backend.src.services.profile_service:Module]
 #
-# @TIER:      CRITICAL
+# @COMPLEXITY: 5
 # @SEMANTICS: profile, service, validation, ownership, filtering, superset, preferences
 # @PURPOSE:   Orchestrates profile preference persistence, Superset account lookup, and deterministic actor matching.
 # @LAYER:     Domain
@@ -51,7 +51,7 @@ SUPPORTED_DENSITIES = {"compact", "comfortable"}
 
 
 # [DEF:ProfileValidationError:Class]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Domain validation error for profile preference update requests.
 class ProfileValidationError(Exception):
     def __init__(self, errors: Sequence[str]):
@@ -61,7 +61,7 @@ class ProfileValidationError(Exception):
 
 
 # [DEF:EnvironmentNotFoundError:Class]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Raised when environment_id from lookup request is unknown in app configuration.
 class EnvironmentNotFoundError(Exception):
     pass
@@ -69,7 +69,7 @@ class EnvironmentNotFoundError(Exception):
 
 
 # [DEF:ProfileAuthorizationError:Class]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Raised when caller attempts cross-user preference mutation.
 class ProfileAuthorizationError(Exception):
     pass
@@ -77,7 +77,7 @@ class ProfileAuthorizationError(Exception):
 
 
 # [DEF:ProfileService:Class]
-# @TIER: CRITICAL
+# @COMPLEXITY: 5
 # @PURPOSE: Implements profile preference read/update flow and Superset account lookup degradation strategy.
 class ProfileService:
     # [DEF:__init__:Function]