fix(gateway): invalidate bootstrap cache on session rollover (openclaw#38535)

Verified:
- pnpm install --frozen-lockfile
- pnpm build
- pnpm check
- pnpm test:macmini

Co-authored-by: yfge <1186273+yfge@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

src/commands/agent/session.ts

@@ -1,5 +1,6 @@
 import crypto from "node:crypto";
 import { listAgentIds } from "../../agents/agent-scope.js";
+import { clearBootstrapSnapshotOnSessionRollover } from "../../agents/bootstrap-cache.js";
 import type { MsgContext } from "../../auto-reply/templating.js";
 import {
   normalizeThinkLevel,
@@ -144,6 +145,11 @@ export function resolveSession(opts: {
     opts.sessionId?.trim() || (fresh ? sessionEntry?.sessionId : undefined) || crypto.randomUUID();
   const isNewSession = !fresh && !opts.sessionId;
 
+  clearBootstrapSnapshotOnSessionRollover({
+    sessionKey,
+    previousSessionId: isNewSession ? sessionEntry?.sessionId : undefined,
+  });
+
   const persistedThinking =
     fresh && sessionEntry?.thinkingLevel
       ? normalizeThinkLevel(sessionEntry.thinkingLevel)