feat: Add Daily Civic Intelligence Refinement Engine

[RohanExploit]

This PR delivers the Daily Civic Intelligence Refinement Engine which parses new submissions daily and automatically improves parameters for severity, grouping, and issue intelligence tracking.

The implementation:

• Uses node-cron inside scheduler/dailyRefinementJob.ts
• Writes localized configuration updates into data/modelWeights.json & snapshots into data/dailySnapshots/YYYY-MM-DD.json.
• Contains no external APIs (fully offline logic mapping to backend/data/issues.db).

All checks pass (Node tests via npm test and frontend suites via npm test --prefix frontend). Note that preexisting backend tests failures reported in backend/main.py are explicitly ignored for isolated Node sub-tasks based on the AGENTS.md/Memory.

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PR created automatically by Jules for task 6467550914294898290 started by @RohanExploit

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Summary by cubic

Adds a daily refinement engine that analyzes new civic submissions and auto-tunes severity, grouping, and intelligence scores. Runs locally on a daily schedule and snapshots each update for auditability.

• New Features

  • Daily job in scheduler/dailyRefinementJob.ts using node-cron; supports --run-now.
  • Engines: TrendAnalyzer (trends/spikes), AdaptiveWeights (severity multipliers), PriorityEngine (duplication thresholds), IntelligenceIndex (civic health score).
  • Reads from backend/data/issues.db; writes to data/modelWeights.json and data/dailySnapshots/YYYY-MM-DD.json; no external APIs.

• Dependencies

  • Adds node-cron for scheduling.

^{Written for commit a3166d9. Summary will update on new commits.}

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[github-actions]

🙏 Thank you for your contribution, @RohanExploit!

PR Details:

• Title: feat: Add Daily Civic Intelligence Refinement Engine
• Number: feat: Add Daily Civic Intelligence Refinement Engine #901

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• No new warnings generated
• Tests added/updated (if applicable)
• All tests passing locally
• No breaking changes to existing functionality

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