fix: resolve #3124 #3125 #3127 session tools, cache priming, and compaction loop

- #3124: Session tools now merge SDK and file-backed sessions for SQLite backend
- #3125: Cache priming fixed for OpenCode >=1.3.14 empty workspace
- #3127: Activity-based progress detection prevents infinite compaction on Kimi/Minimax

All 29 new tests pass, 4885 total tests passing.

src/hooks/zauc-sync-mocks/sync-package-json.test.ts

@@ -148,7 +148,7 @@ describe("syncCachePackageJsonToIntent", () => {
   })
 
   describe("#given cache package.json does not exist", () => {
-    it("#then returns file_not_found error", async () => {
+    it("#then creates cache package.json with the plugin dependency", async () => {
       cleanupTestCache()
       const { syncCachePackageJsonToIntent } = await importFreshSyncPackageJsonModule()
 
@@ -161,13 +161,14 @@ describe("syncCachePackageJsonToIntent", () => {
 
       const result = syncCachePackageJsonToIntent(pluginInfo)
 
-      expect(result.synced).toBe(false)
-      expect(result.error).toBe("file_not_found")
+      expect(result.synced).toBe(true)
+      expect(result.error).toBeNull()
+      expect(readCachePackageJsonVersion()).toBe("latest")
     })
   })
 
   describe("#given plugin not in cache package.json dependencies", () => {
-    it("#then returns plugin_not_in_deps error", async () => {
+    it("#then adds the plugin dependency and preserves existing dependencies", async () => {
       cleanupTestCache()
       mkdirSync(TEST_CACHE_DIR, { recursive: true })
       writeFileSync(
@@ -186,8 +187,13 @@ describe("syncCachePackageJsonToIntent", () => {
 
       const result = syncCachePackageJsonToIntent(pluginInfo)
 
-      expect(result.synced).toBe(false)
-      expect(result.error).toBe("plugin_not_in_deps")
+      expect(result.synced).toBe(true)
+      expect(result.error).toBeNull()
+
+      const content = readFileSync(join(TEST_CACHE_DIR, "package.json"), "utf-8")
+      const pkg = JSON.parse(content) as { dependencies?: Record<string, string> }
+      expect(pkg.dependencies?.["oh-my-opencode"]).toBe("latest")
+      expect(pkg.dependencies?.other).toBe("1.0.0")
     })
   })