feat: catalyst detection service for stock events

- Disclosure-based catalyst identification
- GET /results endpoint for catalyst data by stock
- REST API with health, streams, and trigger endpoints
- Redis Streams for async job processing
- Docker support with multi-stage build

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.dockerignore

@@ -0,0 +1,8 @@
+__pycache__
+*.pyc
+.git
+.venv
+*.egg-info
+dist
+build
+.env