chore: release v0.6.0

[eggai-release-bot]

Release v0.6.0

Added

• Redis subscribe(..., delete_on_ack=True): every entry the subscription
  acks is also XDEL'd (same MULTI), so consumed messages stop occupying
  Redis memory instead of waiting for MAXLEN trimming. Covers handler
  success (including filtered-out messages), the retry stream, and the
  reclaimer's moves to the retry stream / DLQ. A failing handler's entry
  stays in the PEL under the default NACK_ON_ERROR, and is deleted under
  AckPolicy.ACK / ACK_FIRST (which ack it anyway). Opt-in because it
  assumes a single consumer group per stream: XDEL removes the entry for
  every group. connect() raises RuntimeError if another group already
  reads the stream; if one joins later, the group monitor turns deletion off
  for that stream (plain XACK) and logs an error.

Fixed

• MCP adapter reads tool schemas from fastmcp's own Tool instead of the
  protocol Tool, so it works on fastmcp 3 and 4 without touching the
  fields MCP SDK 2 renamed. The mcp extra now allows fastmcp>=3,<5.
• MCP adapter subscriptions declare data_type, so handlers receive parsed
  request models instead of raw dicts. Covered by a new end-to-end test.
• setup_tracing type errors: exporter selection is typed, endpoint is
  passed explicitly, and the unused provider reassignment is gone.
• A2A adapter type errors: A2AConfig imports SecurityScheme
  unconditionally, and the executor no longer falls back to enqueuing a raw
  dict the event queue cannot model.
• CI lint and test jobs install all extras, so the tracing, a2a and mcp
  modules are type-checked and tested.

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After merging, the release will be automatically tagged and published to PyPI.

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