docs: add pipeline schedule alignment implementation plan
15-task plan to align pipelines.json with legacy DataSyncReport.md: - Phase 1: Schema & Models (Tasks 1-3) - Phase 2: GIW Connection (Tasks 4-5) - Phase 3: Core ETL Changes (Tasks 6-8) - Phase 4: Pipeline Configurations (Tasks 9-11) - Phase 5: Validation & Testing (Tasks 12-15)
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