Initial commit: LlamaLink Go rewrite

Complete rewrite from Python/FastAPI to Go/Gin:
- Go backend: auth (API keys + bcrypt), llama.cpp subprocess manager,
  hot-swap multi-model, rate limiting, quota system, webhooks
- Vue 3 SPA admin panel (src/) with Tailwind CSS
- Deployment: Docker multi-stage, docker-compose, nginx, systemd
- GORM/SQLite models: ApiKey, Model, UsageLog, Quota, Webhook
- REST API: /api/v1/admin/* (keys, models, chat, usage, health)
- Embedded frontend via go:embed (build output at web/dist/)

Removed legacy Python artifacts (app/, tests/, pyproject.toml, etc.)

cmd/llamalink/main.go

@@ -0,0 +1,107 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/llamalink/llamalink/internal/api"
+	"github.com/llamalink/llamalink/internal/config"
+	"github.com/llamalink/llamalink/internal/db"
+	"github.com/llamalink/llamalink/internal/llama"
+)
+
+var (
+	Version   = "dev"
+	BuildTime = "unknown"
+)
+
+func main() {
+	cfg := config.Load()
+	logger := cfg.Logger()
+	slog.SetDefault(logger)
+
+	logger.Info("starting llamalink",
+		"version", Version,
+		"build_time", BuildTime,
+		"env", cfg.LlamalinkEnv,
+	)
+
+	// Initialize database
+	database, err := db.Open(cfg)
+	if err != nil {
+		logger.Error("failed to open database", "error", err)
+		os.Exit(1)
+	}
+	defer func() {
+		sqlDB, _ := database.DB()
+		if sqlDB != nil {
+			sqlDB.Close()
+		}
+	}()
+
+	// Run migrations
+	if err := db.Migrate(database); err != nil {
+		logger.Error("failed to run migrations", "error", err)
+		os.Exit(1)
+	}
+	logger.Info("database migrations complete")
+
+	// Seed admin key if needed
+	if err := db.SeedAdminKey(database, cfg.AdminToken); err != nil {
+		logger.Error("failed to seed admin key", "error", err)
+		os.Exit(1)
+	}
+
+	// Initialize llama manager
+	var llamaManager *llama.Manager
+	if cfg.ManageLlamaServer {
+		llamaManager = llama.NewManager(cfg, database)
+		if err := llamaManager.Start(); err != nil {
+			logger.Warn("failed to start llama manager", "error", err)
+		}
+		defer llamaManager.Stop()
+	}
+
+	// Setup router
+	router := api.New(cfg, database, llamaManager)
+
+	// Server
+	addr := fmt.Sprintf("%s:%d", cfg.LlamalinkHost, cfg.LlamalinkPort)
+	srv := &http.Server{
+		Addr:         addr,
+		Handler:      router,
+		ReadTimeout:  30 * time.Second,
+		WriteTimeout: 60 * time.Second,
+		IdleTimeout:  120 * time.Second,
+	}
+
+	// Graceful shutdown
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+
+	go func() {
+		logger.Info("server listening", "addr", addr)
+		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			logger.Error("server error", "error", err)
+			os.Exit(1)
+		}
+	}()
+
+	<-quit
+	logger.Info("shutting down server...")
+
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	if err := srv.Shutdown(ctx); err != nil {
+		logger.Error("server forced to shutdown", "error", err)
+	}
+
+	logger.Info("server stopped")
+}