fix: 协调本地插件与绑定仓库的版本选择 (#6482)

* fix(plugin): reconcile local and bound payload versions

* fix(plugin): preserve bound source on updates

* fix(plugin): normalize source reconciliation ids

* fix(plugin): defer local payload activation

* fix(plugin): centralize startup source admission

* fix(plugin): derive sync mode from admitted source

tests/fixtures/architecture/coverage-baseline.json

@@ -1,8 +1,8 @@
 {
   "application": {
-    "covered_lines": 9620,
-    "percent": 78.22,
-    "statements": 12298
+    "covered_lines": 9649,
+    "percent": 78.24,
+    "statements": 12333
   },
   "domain": {
     "covered_lines": 3392,