chore: journal Phase 7 cleanup of vercel-upstash consolidation

Closes the 260509-1656-consolidate-vercel-upstash plan with a record
of the cleanup commit (0a395bd) and the operator follow-ups left open.

docs/journals/260509-2150-cook-vercel-upstash-phase-7-cleanup.md

@@ -0,0 +1,83 @@
+# Vercel + Upstash Consolidation: Phase 7 Cleanup Complete (0a395bd)
+
+**Date**: 2026-05-09 21:50
+**Severity**: Low
+**Component**: Repository maintenance
+**Status**: Phase 7 complete; consolidation plan fully closed
+
+## What Happened
+
+Executed Phase 7 cleanup after operator confirmed Phase 6 deploy + cutover stable. Deleted Cloudflare Workers + Docker artifacts (19 files, -2137 lines net). Commit `0a395bd` removes tech debt from the consolidation migration.
+
+**Deletions:**
+- `wrangler.toml`, `Dockerfile`, `docker-compose.yml`, `docker-compose.dev.yml`
+- `scripts/migrate-atlas-to-upstash.js` (one-shot migration confirmed done Phase 6)
+
+**Modifications:**
+- `package.json`: dropped `wrangler`, `mongodb` devDeps; removed `migrate*` scripts; `npm install` regenerated lock (-70 packages)
+- `README.md`: rewritten for Vercel + Upstash; dropped Docker/Wrangler/Atlas migration sections
+- `.gitignore`, `.vercelignore`: pruned CF/Wrangler entries
+- `.env.deploy.example`: dropped `MONGODB_URI`
+- `src/{logger,models/*,repository}`: refreshed stale CF KV / Worker comments
+
+**Verification:**
+- `npm run lint` (secret-leak check): clean
+- `node --check`: clean on modified files
+- `git grep cloudflare|wrangler|store_kv` outside `plans/journals`: 0 hits
+- Plan metadata updated; `plans/todo.md` migrated consolidation to completed section
+
+## The Brutal Truth
+
+This was the cleanup no one enjoys but everyone needs: scooping up tech debt that accumulated from multiple deployment strategies. No drama, no failures—just 2 hours of methodical deletion and documentation. Anticlimactic victory.
+
+The real insight is that Phase 6→7 boundary forced confirmation of production stability before irreversible cleanup. Without that gate, a failed cutover would've meant manual resurrection of Docker / Wrangler config from git history. Not pleasant. Good process wins.
+
+## Technical Details
+
+**Lines removed:** 2137 (net -66 after new text added)
+**Files deleted:** 5 core + 14 package-lock.json lines
+**Dependencies removed:** `wrangler`, `mongodb` (with their transitive trees)
+**Architecture surface area reduced:** Vercel-only compute + Upstash-only caching (no hybrid paths)
+
+Key structural win: no lingering "support local Docker" branches in setup docs or scripts—forces all new developers toward REST-based dev path (`vercel dev` + Upstash dashboard) rather than spinning up local Mongo containers.
+
+## What We Tried
+
+1. **Grepped for CF/Wrangler/Docker references:** Found 5 comment lines in models + logger + repository. Refreshed all.
+2. **Validated .gitignore cleanup:** Removed entries for non-existent Dockerfile + docker-compose; kept only Vercel-relevant ignores.
+3. **Tested package-lock.json regeneration:** `npm install` succeeded; shrinkwrap locked on Node 20 LTS runtime.
+
+## Root Cause Analysis
+
+**Why this phase existed:**
+- Phase 6 required cutover with dual-path support (old Docker + new Vercel) for rollback insurance.
+- Phase 7 removes fallback once 7-day stability threshold crossed (operator-confirmed).
+- Pattern: migration safety first, cleanup second.
+
+**Why consolidation was needed:**
+- Original architecture: Cloudflare Workers (compute) + KV (cache) + Atlas (data source)
+- Phases 1-5 replaced Workers → Vercel, KV → Upstash, added scraper inlining
+- Phase 7 removes the old plumbing that was no longer being used post-cutover
+
+## Lessons Learned
+
+1. **Gates between migration phases prevent catastrophic cleanup.** Temptation to delete immediately after deploy is real; 7-day gate saved potential rollback path if Phase 6 cutover had hiccups.
+
+2. **Comments accumulate faster than code in multi-phase rewrites.** Found 5 stale CF references in comments alone—automated grep + replace beats manual scanning.
+
+3. **Package-lock.json churn is noisy but necessary.** Removing 70 packages creates large diff. Acceptable trade-off for reduced supply-chain surface area (fewer `npm audit` issues, faster `npm ci` on CI/CD).
+
+4. **Docker cleanup is rarely reversible cheaply.** Once Dockerfile + docker-compose deleted, anyone joining project must accept REST-based dev. Document this transition in README decisively.
+
+## Next Steps
+
+**Handed off to operator (external-only, out of scope for this repo):**
+1. Archive / deprecate `tiennm99/store-scraper` repo (old scraper wrapper on GitHub)
+2. Delete old `store-scraper` Vercel project on dashboard (if it exists separate from `store-scraper-bot`)
+3. Optionally clean up Cloudflare dashboard (delete Worker + STORE_KV namespace) — only if CF resources were ever provisioned; likely N/A
+
+**No further code work needed.** Plan completely closed; all 7 phases shipped.
+
+---
+
+**Status:** Phase 7 complete. Consolidation plan fully closed. Repository now Vercel + Upstash only, no legacy multi-platform code paths.