chore(board): append AGENT_LOG entry for supabase-subscriber-wire-up session

https://claude.ai/code/session_01SbYsmmbPf9YQuYbHZN52Zh

Author: claude

.claude/board/AGENT_LOG.md

@@ -0,0 +1,13 @@
+# Agent Log — Append-Only Session Record
+
+> **APPEND-ONLY.** Each agent session appends one entry with timestamp,
+> D-ids, commit hash, test count, and outcome. Never edit past entries.
+
+---
+
+## 2026-04-24T16:30 — Supabase subscriber v2 (sonnet, claude/supabase-subscriber-wire-up)
+
+**D-ids:** DM-4a/b/c, DM-6a/b
+**Commit:** `ec3b5c7`
+**Tests:** 17 pass with realtime feature (13 without); 5 new tests total (4 in version_watcher.rs, 1 subscribe_receives_on_project in lance_membrane.rs)
+**Outcome:** Wired LanceMembrane::subscribe() from Phase-A disconnected mpsc stub to live tokio::sync::watch::Receiver<CognitiveEventRow> under [realtime] feature. project() now calls watcher.bump(row.clone()) on every projected cycle. DrainTask scaffold (Poll::Pending) ships unconditionally. Tokio was already a dep - no Cargo.toml changes needed. PR 255: https://github.com/AdaWorldAPI/lance-graph/pull/255