Add /hivemind_capture toggle and fix Deeplake casing

[kaghni]

Summary

• Add /hivemind_capture command to toggle conversation capture on/off
• Add unlinkSync to OpenClaw esbuild fs wrapper (needed by shared auth.ts)
• Fix Deeplake casing in pre-tool-use descriptions (DeepLake → Deeplake)
• Fix duplicate post-build import in esbuild config

Test plan

• Recall working — 5 memories recalled per turn
• Capture working — openclaw sessions written to Deeplake sessions table
• /hivemind_capture toggles capture on/off
• Bundle passes OpenClaw security scanner (0 flagged patterns)
• Build + smoke test passes

[claude]

Claude finished @kaghni's task in 1m 5s —— View job

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Reviewed — no significant issues found. Changes look correct:

• captureEnabled correctly guards capture only (not recall), and defaults to true on process restart which is the safe default
• writeFileSync in the post-build step reuses the top-level import from line 2 — no shadowing or missing reference
• unlinkSync export addition is clean
• Casing fixes are consistent across source and bundled output