Add generic LLM worker

cmd/worker/main.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"context"
+	"log/slog"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"ai-service/internal/config"
+	"ai-service/internal/llm"
+	"ai-service/internal/migrate"
+	"ai-service/internal/store"
+	"ai-service/internal/worker"
+)
+
+func main() {
+	cfg := config.Load()
+	slog.SetDefault(slog.New(slog.NewJSONHandler(os.Stdout, nil)))
+
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
+	db, err := store.Open(ctx, cfg.DatabaseURL)
+	if err != nil {
+		slog.Error("db_open_failed", "error", err)
+		os.Exit(1)
+	}
+	defer db.Close()
+
+	if cfg.MigrateOnStart {
+		if err := migrate.Up(ctx, db); err != nil {
+			slog.Error("migrate_failed", "error", err)
+			os.Exit(1)
+		}
+	}
+
+	if cfg.LLMBaseURL == "" {
+		slog.Error("llm_not_configured")
+		os.Exit(1)
+	}
+
+	llmClient := llm.New(cfg.LLMBaseURL, cfg.LLMAPIKey, cfg.LLMModel, cfg.LLMTimeout)
+	w := worker.New(db, llmClient, cfg.WorkerID, cfg.LLMModel, cfg.WorkerPollInterval, cfg.WorkerClaimLimit)
+
+	slog.Info("ai_worker_started",
+		"worker_id", cfg.WorkerID,
+		"model", cfg.LLMModel,
+		"poll_interval", cfg.WorkerPollInterval.String(),
+		"claim_limit", cfg.WorkerClaimLimit,
+	)
+	w.Run(ctx)
+}