fix(smithery): Add JSON Schema metadata to mcp-config endpoint

Add proper JSON Schema metadata fields per Smithery documentation:
- $schema: JSON Schema draft-07
- $id: Schema identifier URL
- title: Human-readable title
- description: Schema description
- x-query-style: "flat" (no nested objects in our schema)
- additionalProperties: false

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

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

pyproject.toml

@@ -39,7 +39,6 @@ dependencies = [
     "pymupdf>=1.26.6",
     "pymupdf4llm>=0.2.2",
     "pymupdf-layout>=1.26.6",
-    "smithery>=0.4.4",
 ]
 classifiers = [
     "Development Status :: 4 - Beta",