Add Python feed-mode integration example with failure case documentationAdd files via upload

[phillipsmark434-ux]

What does this PR do?

Type

• Bug fix
• New feature
• Docs / examples
• Internal / refactor

Checklist

• Focused on one logical change
• No public API / package / event names renamed
• Tests added or updated where sensible
• CHANGELOG.md updated under [Unreleased]
• Commits signed off (git commit -s)

[phillipsmark434-ux]

Hi attenlabs team!

This PR adds a Python feed-mode integration example for the SAA SDK.

What this contribution includes:

• saa_integration.py: A working proof-of-concept using AttentionClient
  in audio-only feed mode (no microphone or camera required)
• All 12 SDK events wired with clear print output
• Synthetic PCM16 audio feed simulating a real microphone
• LLM lifecycle demonstration (mute, mark_responding, unmute)
• Runtime threshold adjustment example
• 10 failure cases identified and handled with clear error messages

Failure cases covered:

• Missing API key
• SDK not installed
• Auth failed (server error)
• Connection stalled
• WebSocket handshake failure
• feed_audio() called with enable_audio=True
• Wrong audio sample rate
• Rate limiting
• Heavy callback blocking
• No error handler registered

Happy to make any changes based on your feedback!

Best regards,
phillipsmark434-ux