[FEATURE] BidiAgent - Support Conversation Management

[pgrayy]

Problem Statement

Similar to Agent, BidiAgent should accept a conversation manager to prevent an unbounded message history.

Proposed Solution

See Agent for usage details. The application will be similar for BidiAgent.

Use Case

• Can more easily share BidiAgent message history with an Agent instance.

Alternatives Solutions

No response

Additional Context

• Once supported, can remove isinstance check from https://github.com/strands-agents/sdk-python/pull/1308/files#r2600186281.

[pgrayy]

https://github.com/strands-agents/sdk-python/pull/1308/files#r2600186281