Initial import of LogDarioSeq baseline

Establishes version control for the personal Logseq DB fork before
starting the server-client architecture migration and domain features
described in docs/agent-guide and the approved implementation plan.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

libs/src/callable.apis.ts

@@ -0,0 +1,12 @@
+import { PluginLocal } from './LSPlugin.core'
+
+/**
+ * These APIs run in the host and are callable by users,
+ * similar to logseq.apis.cljs but for JS/TS.
+ */
+
+export function setSDKMetadata(this: PluginLocal, data: any) {
+  if (this?.sdk && data) {
+    this.sdk = Object.assign({}, this.sdk, data)
+  }
+}