refactor: rename lancedb memory plugin

docs/plugin.md

@@ -37,6 +37,7 @@ See [Voice Call](/plugins/voice-call) for a concrete example plugin.
 
 - Microsoft Teams is plugin-only as of 2026.1.15; install `@clawdbot/msteams` if you use Teams.
 - Memory (Core) — bundled memory search plugin (enabled by default via `plugins.slots.memory`)
+- Memory (LanceDB) — bundled long-term memory plugin (auto-recall/capture; set `plugins.slots.memory = "memory-lancedb"`)
 - [Voice Call](/plugins/voice-call) — `@clawdbot/voice-call`
 - [Zalo Personal](/plugins/zalouser) — `@clawdbot/zalouser`
 - [Matrix](/channels/matrix) — `@clawdbot/matrix`