feat(api): Expose search_many() on NamespaceView

[shivamm-gupta]

Problem

The main client Dynavec provides batch search via db.search_many(queries: list[str], ...) to run several queries concurrently using a thread pool.

However, NamespaceView (returned by db.namespace(...)) exposes search() and search_stream(), but does not expose search_many(). Callers working with a namespace handle currently have to revert back to the root Dynavec instance and manually restate the namespace:

kb = db.namespace("knowledge-base")

# Currently not available:
# kb.search_many(["query 1", "query 2"])

# Workaround requires dropping back to root client:
db.search_many(["query 1", "query 2"], namespace=kb.namespace)

Proposed Solution

1. Add search_many() to NamespaceView in src/dynavec/namespace.py:

   def search_many(
       self, queries: list[str], *, top_k: int = 10, **kw
   ) -> list[list[SearchResult]]:
       """Run several queries concurrently pinned to this namespace."""
       return self._db.search_many(queries, top_k=top_k, namespace=self._ns, **kw)

2. Keep it as a thin delegation to the existing client batch search executor without introducing a second thread pool.
3. Preserve all query options, keyword arguments, result types, and ordering.

Acceptance Criteria

• Add unit tests in tests/test_namespace.py (or tests/test_client.py):
  • Forwarding multiple queries correctly with namespace isolation.
  • Forwarding keyword arguments (top_k, filters, etc.).
  • Handling empty batch queries=[].
• Type annotations and docstring matching Dynavec.search_many().

[arshsk16]

Hi @shivamm-gupta I'd like to work on this, will add search_many() to NamespaceView as a thin delegation to Dynavec.search_many(), plus tests for multi-query forwarding, kwarg forwarding, and empty batches.

[sriram1900]

Hi @shivamm-gupta, I'd like to work on this issue. I can implement search_many() on NamespaceView and add the requested tests. Could you please assign it to me?

[shivamm-gupta]

Hi @sriram1900 , You may take another issue