v0.49.0

Fixed

• A field selection a bridged tool refuses while rendering is now one retry
  the model can correct, not a failed call. Floors the [mcp] extra at
  djangorestframework-mcp-server>=0.49 (was >=0.48), django-ag-ui>=0.65
  (was >=0.64) and django-pydantic-agent>=0.26 (was >=0.25), which move
  together. On a sidebar given drf_mcp_server=, a read-shaping argument the
  tool's serializer rejected while rendering its result -- most often a
  selection written against a paged changelist's envelope rather than its rows
  -- escaped the tool, so the call failed with its reason withheld and the
  model could not tell what to change. It now comes back as a retry that names
  the argument and quotes the serializer, and the next call returns the page.
  The retry's text reaches the browser, as every argument-validation retry's
  already does; it is the serializer's own client-facing wording, and it is
  produced only for a value the model sent.