conductor(plan): Mark Phase 5 as complete

conductor/tracks/ts_cpp_tree_sitter_20260308/plan.md

@@ -54,7 +54,7 @@ Focus: Implement definitions, signatures, and update tools
   - HOW: Use AST to find target range; surgically replace lines in file
   - SAFETY: Verify AST still parses after edit (optional but recommended)
 
-- [ ] Task 5.4: Register Phase 5 tools in dispatch and schema
+- [x] Task 5.4: Register Phase 5 tools in dispatch and schema 4e8b397
   - WHERE: src/mcp_client.py
   - WHAT: Add tools to `get_tool_schemas` and `dispatch`
   - HOW: Standard registration pattern