- Add plugin_trigger_providers and plugin_trigger_providers_lock to contexts module
- Implement caching mechanism in TriggerManager.get_trigger_provider() method
- Cache fetched trigger providers to reduce repeated daemon calls
- Use double-check locking pattern for thread-safe cache access
This follows the same pattern as ToolManager.get_plugin_provider() to improve performance
by avoiding redundant requests to the daemon when accessing trigger providers.
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Co-Authored-By: Claude <noreply@anthropic.com>