feat: implement OpenAPI-first workflow, CQRS analytics, audit trail, and benchmarking#649
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…and benchmarking - Issue Smartdevs17#580: OpenAPI-first SDK generation workflow - Upgrade OpenAPI spec to 3.1 at spec/openapi.yaml (single source of truth) - Add CI workflow for spec validation and auto-generation - SDK generation script (scripts/sdk-generate.sh) - Update docs/openapi.yaml to 3.1 - Issue Smartdevs17#576: CQRS pattern with materialized views - Query handlers for MRR, cohort retention, LTV views - Command handlers for subscription write operations - Migration 003 with mrr_mv, cohort_retention_mv, ltv_mv - CDC connector configuration with per-view refresh policies - Updated mvRefreshJob with new views and scheduling - Issue Smartdevs17#572: Tamper-evident audit trail - HashChainService with SHA-256 linked hash chain - AuditWriter for event capture - BlockchainAnchor with periodic Stellar anchoring (every 1000 entries/24h) - REST controller with query and verification API - Jobs: log rotation, integrity checker, blockchain anchor - Audit logging middleware for auto-capture - Soroban contract (contracts/audit/) for on-chain anchoring - Migration 004 with audit_events, audit_anchors, audit_quarantine tables - Issue Smartdevs17#571: Subscription benchmarking - BenchmarkEngine with differential privacy (epsilon=1.0) - Industry vertical taxonomy (6 verticals) - Anonymized peer comparison (p25/p50/p75) - k-anonymity enforcement (min 10 peers) - BenchmarkConsentService with opt-in/opt-out - Mobile BenchmarkReportScreen with interactive bars - Monthly aggregation and data purge jobs Closes Smartdevs17#580, Smartdevs17#576, Smartdevs17#572, Smartdevs17#571
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Summary
This PR implements four major feature requests across the SubTrackr platform:
🔄 OpenAPI-First SDK Generation (#580)
spec/openapi.yaml) as the single source of truth.github/workflows/sdk-generate.yml) for spec validation + auto-generationscripts/sdk-generate.shfor JS/Python/Go SDK regeneration📊 CQRS Analytics Pattern (#576)
db/migrations/003_cqrs_materialized_views.sql)backend/analytics/command/)backend/analytics/query/)backend/shared/cdc/)MVRefreshJobwith configurable intervals (5 min / 1h / 24h)refreshed_attimestamp🔒 Tamper-Evident Audit Trail (#572)
backend/audit/domain/HashChainService.ts)contracts/audit/)/audit/verifyreturns chain integrity statusaudit_quarantine)📈 Subscription Benchmarking (#571)
BenchmarkReportScreen.tsxwith interactive metric barsFiles Changed
Closes #580
Closes #576
Closes #572
Closes #571