Add comprehensive tests for schema cleanup migration and search comparison

- Implement tests for migration 005 to verify removal of deprecated fields in the database schema.
- Ensure that new databases are created with a clean schema.
- Validate that keywords are correctly extracted from the normalized file_keywords table.
- Test symbol insertion without deprecated fields and subdir operations without direct_files.
- Create a detailed search comparison test to evaluate vector search vs hybrid search performance.
- Add a script for reindexing projects to extract code relationships and verify GraphAnalyzer functionality.
- Include a test script to check TreeSitter parser availability and relationship extraction from sample files.

ccw/src/core/routes/graph-routes.md

@@ -20,9 +20,7 @@ Query all symbols from the CodexLens SQLite database and return them as graph no
       "name": "functionName",
       "type": "FUNCTION",
       "file": "src/file.ts",
-      "line": 10,
-      "docstring": "function_type",
-      "tokenCount": 45
+      "line": 10
     }
   ]
 }
@@ -98,7 +96,7 @@ Maps source code paths to CodexLens index database paths following the storage s
 ### Database Schema
 Queries two main tables:
 1. **symbols** - Code symbol definitions
-   - `id`, `file_id`, `name`, `kind`, `start_line`, `end_line`, `token_count`, `symbol_type`
+   - `id`, `file_id`, `name`, `kind`, `start_line`, `end_line`
 2. **code_relationships** - Inter-symbol dependencies
    - `id`, `source_symbol_id`, `target_qualified_name`, `relationship_type`, `source_line`, `target_file`