v0.11.1

Changed

• Adopted the current sibling-package release lines. The [spec-tools] extra now
  requires djangorestframework-pydantic-ai>=0.2,<0.3 — 0.2.0 renamed its import
  to rest_framework_pydantic_ai, and build_spec_toolset was updated to import
  the new name. The [drf-mcp] extra's djangorestframework-mcp-server pin was
  widened to >=0.9,<0.11 to allow the published 0.10.x line.