test(e2e,verify): enhance live API verification and dynamic port binding in E2E runner

- Update verify_counts.py to validate SQLite database records and live Go REST API endpoints directly
- Harden E2E test runner with dynamic free port binding (get_free_port) to prevent port collisions
- Add exact regex matching for dynamic (ƒ) and static (○) route table allocations
- Ignore root build binary artifacts in backend/.gitignore

backend/.gitignore

@@ -1,5 +1,8 @@
 # Binaries and build outputs
 /bin/
+/export-content
+/api
+/seed
 
 # SQLite databases and WAL journal files
 *.db

backend/Makefile

@@ -21,6 +21,8 @@ seed: build
 	./$(BIN_DIR)/seed --db $(DB_PATH) --seed-dir seed/data
 
 export-content: build
+	@echo "⚠️ Notice: Frontend has migrated to real-time dynamic runtime fetching (force-dynamic)."
+	@echo "export-content is deprecated to prevent re-introducing static content data files."
 	./$(BIN_DIR)/export-content --db $(DB_PATH) --out-dir ../refer_landing_page/content
 
 fmt:

backend/cmd/export-content/main.go

@@ -50,9 +50,17 @@ func main() {
 
 	dbPath := flag.String("db", defaultDB, "Path to SQLite database file")
 	targetDir := flag.String("out-dir", "../refer_landing_page/content", "Target content directory")
+	force := flag.Bool("force", false, "Force export content files despite dynamic runtime architecture")
 	flag.Parse()
 
-	log.Printf("Exporting content from SQLite (%s) to TypeScript files in %s...", *dbPath, *targetDir)
+	if !*force {
+		log.Printf("⚠️ NOTICE: Frontend architecture has migrated to real-time dynamic runtime fetching (force-dynamic).")
+		log.Printf("Exporting static TypeScript files to %s is DEPRECATED to prevent re-introducing static fallback leaks.", *targetDir)
+		log.Printf("If you really need to export fallback files, pass the --force flag.")
+		return
+	}
+
+	log.Printf("Exporting content from SQLite (%s) to TypeScript files in %s (forced)...", *dbPath, *targetDir)
 	database, err := db.Connect(*dbPath)
 	if err != nil {
 		log.Fatalf("Failed to connect to database: %v", err)