Bug: `search_code` fails with "Cannot read properties of null (reading 'scores')" while index is completed

echo '{"jsonrpc":"2.0","id":"1","method":"tools/call","params":{"name":"index_codebase","arguments":{"path":"/data1/my-project"}}}' | \
  EMBEDDING_PROVIDER=Ollama EMBEDDING_MODEL=nomic-embed-text OLLAMA_HOST=http://127.0.0.1:11434 EMBEDDING_DIMENSION=768 MILVUS_ADDRESS=http://127.0.0.1:19530 MILVUS_TOKEN="" \
  claude-context-mcp 2>/dev/null

2. Confirm indexing is complete:

echo '{"jsonrpc":"2.0","id":"2","method":"tools/call","params":{"name":"get_indexing_status","arguments":{"path":"/data1/my-project"}}}' | \
  ...same env... claude-context-mcp 2>/dev/null

Output:
✅ Codebase '/data1/my-project' is fully indexed and ready for search.
 Statistics: 31 files, 893 chunks
 Status: completed

3. Search the indexed codebase:

echo '{"jsonrpc":"2.0","id":"3","method":"tools/call","params":{"name":"search_code","arguments":{"path":"/data1/my-project","query":"agent","limit":5}}}' | \
  ...same env... claude-context-mcp 2>/dev/null

Expected behavior

Returns code search results (relevant file paths and code snippets matching "agent").

Actual behavior

Always returns an internal error:

{
  "result": {
    "content": [{
      "type": "text",
      "text": "Error searching code: Cannot read properties of null (reading 'scores') Please check if the codebase has been indexed first."
    }],
    "isError": true
  },
  "jsonrpc": "2.0",
  "id": "3"
}

Additional context

- get_indexing_status reports completed and shows correct file/chunk counts
- Ollama embedding API is working correctly (tested via curl http://127.0.0.1:11434/api/embeddings)
- The path and query arguments are both valid strings (verified before sending)
- Same error with both AST splitter and langchain splitter
- Same error with both the local binary and npx @zilliz/claude-context-mcp@latest
- The error appears to be a JavaScript TypeError where the result from Milvus is null/undefined and .scores is accessed without a null check
- This is reproducible 100% of the time — index_codebase and get_indexing_status work perfectly, but search_code always fails with this error