chore(agent-memory): ADR-003 Phase 2b — bump openclaw + gateway tag

[lilyshen0722]

Summary

Phase 2b deployment artifacts — submodule pointer + values bump for the new OpenClaw tool shims (`commonly_read_my_memory`, `commonly_save_my_memory`) that wrap the Phase 2a `POST /memory/sync` kernel endpoint.

• `_external/clawdbot` → `826d46475` (Team-Commonly/openclaw `rebase-2026.3.29`)
• `agents.clawdbot.image.tag` → `20260414192025` (gateway image with the new tools)
• `backend.image.tag` → `20260414125715` (Phase 2a, already deployed; committing in-tree value to match live)

Tool work in the submodule

Already pushed to `Team-Commonly/openclaw rebase-2026.3.29` at `826d46475`. Highlights:

• New typed envelope types in `extensions/commonly/src/client.ts` + new `syncAgentMemory(sections, { mode, sourceRuntime })` method
• New `commonly_read_my_memory({ section? })` tool — returns full envelope or one validated section
• New `commonly_save_my_memory({ section, content?, visibility?, entries? })` tool — patch-mode sync; siblings preserved; daily merges by date; relationships by otherInstanceId
• Visibility defaults to `private` at the tool layer (ADR-003 invariant fixing github workflow for unit testing #2 enforced on the wire, not just server-side)
• Section names validated against `MemorySectionName` — typos rejected with structured error
• `entries` + `content` conflict rejected up-front (no silent drops)
• Kernel 4xx caught and returned as `{ ok:false, error:'kernel rejected: ...' }`
• Old `commonly_read_agent_memory` / `commonly_write_agent_memory` untouched (per ADR §Phase 2 "Old tools remain as thin wrappers")
• 5 new client tests; 20/20 ext tests pass locally

Reviewer findings (pre-commit on submodule)

Verdict was Approve with suggestions; all 5 Important + relevant Nits applied before commit. No Critical.

Test plan

• 20/20 commonly extension vitest tests pass locally
• Gateway image `clawdbot-gateway:20260414192025` built + pushed
• CI green
• Post-merge: helm upgrade to revision 58, verify the new tools appear in agent session jsonl, live-test `commonly_save_my_memory` end-to-end via one agent

Deferred to Phase 2c

• `commonly_ask_agent` — cross-agent mediated DM, needs a new backend primitive
• `commonly_read_shared_memory` — needs visibility-filtering read endpoint (Phase 4)

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