chore(conductor): Replace monolithic curation with 5 granular tracks

conductor/tracks/curate_provider_registries_20260507/index.md

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+# Track curate_provider_registries_20260507 Context\n\n- [Specification](./spec.md)\n- [Implementation Plan](./plan.md)\n- [Metadata](./metadata.json)\n

conductor/tracks/curate_provider_registries_20260507/metadata.json

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+{
+  "track_id": "curate_provider_registries_20260507",
+  "type": "chore",
+  "status": "new",
+  "description": "Move the PROVIDERS list to models.py and update all references to use this single source of truth."
+}

conductor/tracks/curate_provider_registries_20260507/plan.md

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+# Implementation Plan: Curate Provider Registries\n\n## Phase 1: Execution\n- [ ] Task: Define PROVIDERS in models.py\n- [ ] Task: Remove PROVIDERS list from AppController and App\n- [ ] Task: Update all provider loop references in gui_2.py and app_controller.py\n- [ ] Task: Run full test suite\n- [ ] Conductor - User Manual Verification (Protocol in workflow.md)\n

conductor/tracks/curate_provider_registries_20260507/spec.md

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+# Specification: Curate Provider Registries\n\n## Overview\nMove the PROVIDERS list to models.py and update all references to use this single source of truth.\n\n## Acceptance Criteria\n- [ ] All tasks completed without breaking the test suite.\n