V0.38.2 library packages (#235)

Co-authored-by: gobha <jasafpro@gmail.com>
Co-committed-by: gobha <jasafpro@gmail.com>

server/models/ext_dependency.go

@@ -0,0 +1,13 @@
+package models
+
+// ── Extension Dependencies (v0.38.2) ──────────────────
+
+// ExtDependency records that a consumer package depends on a library package.
+// Created at consumer install time from the manifest's "dependencies" map.
+// Immutable — update by uninstalling/reinstalling the consumer.
+type ExtDependency struct {
+	ConsumerID  string `json:"consumer_id" db:"consumer_id"`
+	LibraryID   string `json:"library_id" db:"library_id"`
+	VersionSpec string `json:"version_spec" db:"version_spec"`
+	ResolvedVer string `json:"resolved_ver" db:"resolved_ver"`
+}