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.)

internal/api/handlers/health.go

@@ -0,0 +1,58 @@
+package handlers
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+
+	"github.com/llamalink/llamalink/internal/llama"
+)
+
+type HealthHandler struct {
+	db      *gorm.DB
+	manager *llama.Manager
+}
+
+func NewHealthHandler(db *gorm.DB, manager *llama.Manager) *HealthHandler {
+	return &HealthHandler{db: db, manager: manager}
+}
+
+func (h *HealthHandler) Health(c *gin.Context) {
+	c.JSON(http.StatusOK, gin.H{
+		"status": "ok",
+	})
+}
+
+func (h *HealthHandler) Ready(c *gin.Context) {
+	// Check DB
+	sqlDB, err := h.db.DB()
+	if err != nil {
+		c.JSON(http.StatusServiceUnavailable, gin.H{
+			"status":   "not_ready",
+			"database": "error",
+		})
+		return
+	}
+	if err := sqlDB.Ping(); err != nil {
+		c.JSON(http.StatusServiceUnavailable, gin.H{
+			"status":   "not_ready",
+			"database": "unhealthy",
+		})
+		return
+	}
+
+	// Check model manager
+	modelReady := h.manager == nil || h.manager.IsReady()
+	modelName := ""
+	if h.manager != nil {
+		modelName = h.manager.CurrentModel()
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"status":       "ready",
+		"database":     "ok",
+		"model_active": modelReady,
+		"model_name":   modelName,
+	})
+}