feat: add unified memory routing to consolidation service

- Add MemoryRouteClassification and MemoryRoutingResult models
- Implement unified classifier (_classify_web_results_unified) that routes
  web results to: wiki, volatile, file (Paperless), prefetch, or skip
- Add routing methods: _route_to_volatile, _route_to_files, _register_prefetch
- Update _process_search to use unified classifier instead of separate analysis
- Add get_volatile_cache_service factory to dependencies
- Wire volatile_service and settings_client into ConsolidationService
- Update ConsolidationResult/Response with new routing counters

Test fixes:
- Fix WikiJSClient fixtures to use api_token instead of username/password
- Fix entity linking test assertions to expect full user-namespaced paths
- Add sample_unified_classification fixture for new classifier format

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/routers/consolidation.py

@@ -12,7 +12,8 @@ from src.models.consolidation import ConsolidationRequest, ConsolidationResponse
 from src.services.consolidation_service import ConsolidationService
 from src.core.dependencies import (
     Neo4jDep, OllamaDep, WikiJSDep,
-    verify_api_key, get_settings, get_ingestion_service
+    verify_api_key, get_settings, get_ingestion_service,
+    get_volatile_cache_service, get_settings_client,
 )
 from src.config import Settings
 
@@ -34,7 +35,9 @@ def get_consolidation_service(
         ollama=ollama_client,
         wiki=wiki_client,
         settings=settings,
-        ingestion_service=get_ingestion_service()
+        ingestion_service=get_ingestion_service(),
+        volatile_service=get_volatile_cache_service(),
+        settings_client=get_settings_client(),
     )