Add generic LLM worker

internal/config/config.go

@@ -17,6 +17,10 @@ type Config struct {
 	LLMModel    string
 	LLMTimeout  time.Duration
 	WhisperXURL string
+
+	WorkerID           string
+	WorkerPollInterval time.Duration
+	WorkerClaimLimit   int
 }
 
 func Load() Config {
@@ -31,6 +35,10 @@ func Load() Config {
 		LLMModel:    envString("LLM_MODEL", "qwen2.5-14b"),
 		LLMTimeout:  envDuration("LLM_TIMEOUT", 5*time.Minute),
 		WhisperXURL: envString("WHISPERX_URL", ""),
+
+		WorkerID:           envString("WORKER_ID", hostname()),
+		WorkerPollInterval: envDuration("WORKER_POLL_INTERVAL", 2*time.Second),
+		WorkerClaimLimit:   envInt("WORKER_CLAIM_LIMIT", 4),
 	}
 }
 
@@ -76,3 +84,11 @@ func envDuration(key string, fallback time.Duration) time.Duration {
 	}
 	return v
 }
+
+func hostname() string {
+	h, err := os.Hostname()
+	if err != nil || h == "" {
+		return "ai-service-worker"
+	}
+	return h
+}