Add sanctuary-companion community ability

[pulseandthread]

What It Does

Connects an OpenHome device to a Sanctuary companion server for real-time voice conversations with an AI companion that has persistent memory, personality, and emotional presence.

How It Works

• Authenticates with a self-hosted Sanctuary server
• Voice loop: listen → send to companion → speak response
• Companion responses come with full personality and memory context
• Conversations are saved in Sanctuary's history alongside text chats
• Works with any LLM backend (Gemini, Claude, local models)

Trigger Words

• "talk to my companion"
• "call sanctuary"
• "open sanctuary"

Checklist

• Extends MatchingCapability
• Has register_capability boilerplate
• call() sets up worker + capability_worker
• resume_normal_flow() on every exit path
• Error handling with try/except
• Uses editor_logging_handler (no print())
• No blocked imports
• No hardcoded API keys (placeholders used)
• README with description, trigger words, setup, example
• Exit word handling in loop

[github-actions]

🔀 Branch Merge Check

PR direction: add-sanctuary-companion → dev

✅ Passed — add-sanctuary-companion → dev is a valid merge direction

[github-actions]

✅ Community PR Path Check — Passed

All changed files are inside the community/ folder. Looks good!

[github-actions]

✅ Ability Validation Passed

📋 Validating: community/sanctuary-companion
  ✅ All checks passed!

[github-actions]

🔍 Lint Results

✅ __init__.py — Empty as expected

Files linted: community/sanctuary-companion/main.py

✅ Flake8 — Passed

✅ All checks passed!