fix(plugin-sdk): remove remaining bundled plugin src imports (openclaw#39638)

Verified:
- pnpm build
- pnpm check
- pnpm test:macmini

Co-authored-by: Kyle <3477429+kyledh@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

extensions/bluebubbles/src/monitor-normalize.ts

@@ -1,4 +1,4 @@
-import { parseFiniteNumber } from "../../../src/infra/parse-finite-number.js";
+import { parseFiniteNumber } from "openclaw/plugin-sdk/bluebubbles";
 import { extractHandleFromChatGuid, normalizeBlueBubblesHandle } from "./targets.js";
 import type { BlueBubblesAttachment } from "./types.js";