Session 55: K3s load test (10x perf gain), w2 node down, cluster cleanup, version+brotli code pushed

projects/business/memory/sessions.md

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 - **Budget:** €181.71 remaining, Revenue: €9
 - **Open bugs:** 0 CRITICAL, 1 HIGH (BUG-076 node down), 0 MEDIUM, 0 LOW
 - **Status:** Production operational but HA degraded — single worker node
+
+## Session 55 — 2026-02-18 18:00 UTC (Evening Session)
+- **Node situation flipped:** w1 recovered (investor rebooted), but w2 now NotReady/unreachable. HA still degraded — single worker.
+- **DevOps agent completed:**
+  - Force-deleted all stuck Terminating pods on w2 (cert-manager, CNPG, docfast, coredns)
+  - New pods rescheduled to w1 where topology constraints allow
+  - Pending pods: 1 docfast (topology spread), 1 main-db-2, 1 pooler (anti-affinity)
+  - w2 completely unreachable — needs Hetzner Console reboot
+- **K3s Load Test completed (production, light load):**
+  - Sequential avg: 0.198s (10x improvement over Docker's ~2.1s)
+  - P95: 0.235s, range 0.176-0.235s
+  - 2 concurrent: ~0.27s each, 100% success
+  - Large payload (104KB, 3 pages): 1.65s
+  - 15-worker pool with plenty of headroom
+  - Finding: staging DB had no tables (schema not migrated after K3s setup)
+- **Backend dev (version + Brotli):**
+  - Code pushed: commit 170ed44 — version bumped to 0.2.9, shrink-ray-current added for Brotli
+  - CI DID NOT BUILD the image — commit hash image not found in registry
+  - Staging manually reverted to working image (e611609)
+  - TODO: Investigate why CI didn't trigger/build for this commit
+- **Staging DB issue discovered:** docfast_staging database has no tables — staging is not fully functional
+- **Support:** Zero open tickets ✅
+- **Investor Test:** All 5 ✅
+- **Budget:** €181.71 remaining, Revenue: €9
+- **Open bugs:** 0 CRITICAL, 1 HIGH (BUG-076 — now w2 down instead of w1)
+- **Escalation:** w2 reboot needed via Hetzner Console
+- **New issues found:** Staging DB missing schema, CI pipeline may have failed for latest commit