Fix ruff linting errors causing CI failures

[Copilot]

CI was failing due to 12 ruff violations (F401 unused imports, F841 unused variable) introduced across the ingestion and prediction layers.

Changes

• ingestion/api.py — remove RiskAlert, TrackObject, base64, cv2, numpy (all live in worker.py, not here)
• ingestion/database.py — remove datetime, timezone, Optional, Any (only List is used)
• ingestion/worker.py — remove datetime, timezone (unreferenced in this module)
• prediction/pipeline.py — drop dead assignment current = sat_state.copy(); propagate_state was already called with the original sat_state directly, making current a no-op

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• redis
  • Triggering command: /home/REDACTED/.local/bin/pytest pytest tests/ -v --tb=short (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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