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/__tests__/test_encryption_manager.py

@@ -1,5 +1,5 @@
 # [DEF:test_encryption_manager:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: encryption, security, fernet, api-keys, tests
 # @PURPOSE: Unit tests for EncryptionManager encrypt/decrypt functionality.
 # @LAYER: Domain

backend/src/services/__tests__/test_health_service.py

@@ -5,7 +5,7 @@ from src.services.health_service import HealthService
 from src.models.llm import ValidationRecord
 
 # [DEF:test_health_service:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Unit tests for HealthService aggregation logic.
 
 @pytest.mark.asyncio

backend/src/services/__tests__/test_llm_plugin_persistence.py

@@ -1,5 +1,5 @@
 # [DEF:backend.src.services.__tests__.test_llm_plugin_persistence:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Regression test for ValidationRecord persistence fields populated from task context.
 
 import types

backend/src/services/__tests__/test_llm_prompt_templates.py

@@ -1,5 +1,5 @@
 # [DEF:backend.src.services.__tests__.test_llm_prompt_templates:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: tests, llm, prompts, templates, settings
 # @PURPOSE: Validate normalization and rendering behavior for configurable LLM prompt templates.
 # @LAYER: Domain Tests
@@ -18,7 +18,7 @@ from src.services.llm_prompt_templates import (
 
 
 # [DEF:test_normalize_llm_settings_adds_default_prompts:Function]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Ensure legacy/partial llm settings are expanded with all prompt defaults.
 # @PRE: Input llm settings do not contain complete prompts object.
 # @POST: Returned structure includes required prompt templates with fallback defaults.
@@ -39,7 +39,7 @@ def test_normalize_llm_settings_adds_default_prompts():
 
 
 # [DEF:test_normalize_llm_settings_keeps_custom_prompt_values:Function]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Ensure user-customized prompt values are preserved during normalization.
 # @PRE: Input llm settings contain custom prompt override.
 # @POST: Custom prompt value remains unchanged in normalized output.
@@ -54,7 +54,7 @@ def test_normalize_llm_settings_keeps_custom_prompt_values():
 
 
 # [DEF:test_render_prompt_replaces_known_placeholders:Function]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Ensure template placeholders are deterministically replaced.
 # @PRE: Template contains placeholders matching provided variables.
 # @POST: Rendered prompt string contains substituted values.
@@ -69,7 +69,7 @@ def test_render_prompt_replaces_known_placeholders():
 
 
 # [DEF:test_is_multimodal_model_detects_known_vision_models:Function]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Ensure multimodal model detection recognizes common vision-capable model names.
 def test_is_multimodal_model_detects_known_vision_models():
     assert is_multimodal_model("gpt-4o") is True
@@ -80,7 +80,7 @@ def test_is_multimodal_model_detects_known_vision_models():
 
 
 # [DEF:test_resolve_bound_provider_id_prefers_binding_then_default:Function]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Verify provider binding resolution priority.
 def test_resolve_bound_provider_id_prefers_binding_then_default():
     settings = {
@@ -93,7 +93,7 @@ def test_resolve_bound_provider_id_prefers_binding_then_default():
 
 
 # [DEF:test_normalize_llm_settings_keeps_assistant_planner_settings:Function]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Ensure assistant planner provider/model fields are preserved and normalized.
 def test_normalize_llm_settings_keeps_assistant_planner_settings():
     normalized = normalize_llm_settings(

backend/src/services/__tests__/test_rbac_permission_catalog.py

@@ -1,5 +1,5 @@
 # [DEF:backend.src.services.__tests__.test_rbac_permission_catalog:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: tests, rbac, permissions, catalog, discovery, sync
 # @PURPOSE: Verifies RBAC permission catalog discovery and idempotent synchronization behavior.
 # @LAYER: Service Tests

backend/src/services/__tests__/test_resource_service.py

@@ -1,5 +1,5 @@
 # [DEF:backend.src.services.__tests__.test_resource_service:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: resource-service, tests, dashboards, datasets, activity
 # @PURPOSE: Unit tests for ResourceService
 # @LAYER: Service