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/auto-update-checker/constants.test.ts

@@ -6,9 +6,9 @@ describe("auto-update-checker constants", () => {
   it("uses the OpenCode cache directory for installed package metadata", async () => {
     const { CACHE_DIR, INSTALLED_PACKAGE_JSON, PACKAGE_NAME } = await import(`./constants?test=${Date.now()}`)
 
-    expect(CACHE_DIR).toBe(getOpenCodeCacheDir())
+    expect(CACHE_DIR).toBe(join(getOpenCodeCacheDir(), "packages"))
     expect(INSTALLED_PACKAGE_JSON).toBe(
-      join(getOpenCodeCacheDir(), "node_modules", PACKAGE_NAME, "package.json")
+      join(getOpenCodeCacheDir(), "packages", "node_modules", PACKAGE_NAME, "package.json")
     )
   })
 })