Update trigger-ci-workflows.sh to match current workflows

[strawgate]

Summary

• Remove the IMPROVERS category — all 7 workflows (Bug Exterminator, Code Duplication Fixer, Code Simplifier, Newbie Contributor Fixer, Small Problem Fixer, Test Improver, Text Beautifier) have been phased out and their trigger files deleted
• Replace with FIXERS category containing the 2 remaining scheduled fixer workflows: Refactor Opportunist and Stale Issues Remediator
• Add 6 missing detectors to DETECTORS: Autonomy Atomicity Analyzer, Framework Best Practices, Information Architecture, Prompt Audit, UX Design Patrol, and rename Stale Issues → Stale Issues Investigator
• Fix MONITORS: remove 3 dead entries (Agent Deep Dive, Agent Efficiency, Release Update Check), correct Downstream Health → Estc Downstream Health, add Product Manager Impersonator

Test plan

• ./scripts/trigger-ci-workflows.sh --list shows all 19 scheduled workflows across 3 categories
• ./scripts/trigger-ci-workflows.sh --dry-run completes without errors
• Category names match actual workflow names in .github/workflows/trigger-*.yml

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• scripts/trigger-ci-workflows.sh

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📝 Walkthrough

Walkthrough

The pull request refactors scripts/trigger-ci-workflows.sh to replace the IMPROVERS category with FIXERS throughout the workflow triggering infrastructure. Changes include updating the FIXERS array declaration, modifying ALL_CATEGORIES to use detectors, fixers, and monitors, adjusting function mappings in get_workflows, and updating command-line parsing and error messages to reference the new category. Total dispatch accounting is also updated accordingly.

Possibly related PRs

• Add test-coverage-detector workflow (detector/fixer pair for test-improver) #488: Also modifies scripts/trigger-ci-workflows.sh to work with the FIXERS category renaming and adds detector entries that reference fixer workflows.

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch update-trigger-ci-workflows

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