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/plugins/llm_analysis/__init__.py

@@ -1,5 +1,5 @@
 # [DEF:backend/src/plugins/llm_analysis/__init__.py:Module]
-# @TIER: TRIVIAL
+# @COMPLEXITY: 1
 # @PURPOSE: Initialize the LLM Analysis plugin package.
 # @LAYER: Domain
 

backend/src/plugins/llm_analysis/__tests__/test_client_headers.py

@@ -1,5 +1,5 @@
 # [DEF:backend.src.plugins.llm_analysis.__tests__.test_client_headers:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: tests, llm-client, openrouter, headers
 # @PURPOSE: Verify OpenRouter client initialization includes provider-specific headers.
 

backend/src/plugins/llm_analysis/__tests__/test_screenshot_service.py

@@ -1,5 +1,5 @@
 # [DEF:backend.src.plugins.llm_analysis.__tests__.test_screenshot_service:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: tests, screenshot-service, navigation, timeout-regression
 # @PURPOSE: Protect dashboard screenshot navigation from brittle networkidle waits.
 

backend/src/plugins/llm_analysis/__tests__/test_service.py

@@ -1,5 +1,5 @@
 # [DEF:backend.src.plugins.llm_analysis.__tests__.test_service:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: tests, llm-analysis, fallback, provider-error, unknown-status
 # @PURPOSE: Verify LLM analysis transport/provider failures do not masquerade as dashboard FAIL results.
 

backend/src/plugins/llm_analysis/models.py

@@ -1,5 +1,5 @@
 # [DEF:backend/src/plugins/llm_analysis/models.py:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: pydantic, models, llm
 # @PURPOSE: Define Pydantic models for LLM Analysis plugin.
 # @LAYER: Domain

backend/src/plugins/llm_analysis/plugin.py

@@ -1,5 +1,5 @@
 # [DEF:backend/src/plugins/llm_analysis/plugin.py:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: plugin, llm, analysis, documentation
 # @PURPOSE: Implements DashboardValidationPlugin and DocumentationPlugin.
 # @LAYER: Domain

backend/src/plugins/llm_analysis/scheduler.py

@@ -1,5 +1,5 @@
 # [DEF:backend/src/plugins/llm_analysis/scheduler.py:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: scheduler, task, automation
 # @PURPOSE: Provides helper functions to schedule LLM-based validation tasks.
 # @LAYER: Domain

backend/src/plugins/llm_analysis/service.py

@@ -1,5 +1,5 @@
 # [DEF:backend/src/plugins/llm_analysis/service.py:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: service, llm, screenshot, playwright, openai
 # @PURPOSE: Services for LLM interaction and dashboard screenshots.
 # @LAYER: Domain