fix: add content_extractor to smart-create endpoint

The POST /wiki/pages/smart-create endpoint was failing with 500
Internal Server Error because HybridRAGService.__init__() was
missing the required content_extractor parameter.

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

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

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "library-desk"
-version = "1.3.0"
+version = "1.3.1"
 description = "Coordination service for The Library system - HybridRAG queries, document ingestion, entity extraction, and knowledge consolidation"
 readme = "README.md"
 requires-python = ">=3.12"