feat: завершён этап 1 - Фундамент Core Service

- Удалены зависимости: grpc, redis, prometheus
- Упрощена конфигурация (Server, Database, JWT)
- Создан логгер на основе logrus
- Добавлено подключение к PostgreSQL
- Создана миграция с базовыми таблицами
- Обновлены модели с валидацией
- Создан базовый API сервер с health check
- Добавлен .env.example

Готово для этапа 2 - Аутентификация

core-service/internal/api/server.go

@@ -0,0 +1,179 @@
+package api
+
+import (
+	"context"
+	"database/sql"
+	"net/http"
+
+	"erp-mvp/core-service/internal/config"
+	"erp-mvp/core-service/internal/logger"
+
+	"github.com/gin-gonic/gin"
+)
+
+type Server struct {
+	config *config.Config
+	db     *sql.DB
+	logger logger.Logger
+	router *gin.Engine
+}
+
+func NewServer(cfg *config.Config, db *sql.DB, log logger.Logger) *Server {
+	server := &Server{
+		config: cfg,
+		db:     db,
+		logger: log,
+		router: gin.Default(),
+	}
+
+	server.setupRoutes()
+	return server
+}
+
+func (s *Server) setupRoutes() {
+	// Health check
+	s.router.GET("/health", s.healthCheck)
+
+	// API routes
+	api := s.router.Group("/api")
+	{
+		// Auth routes
+		auth := api.Group("/auth")
+		{
+			auth.POST("/register", s.register)
+			auth.POST("/login", s.login)
+		}
+
+		// Protected routes
+		protected := api.Group("/")
+		protected.Use(s.authMiddleware())
+		{
+			// Organizations
+			protected.GET("/organizations/:id", s.getOrganization)
+			protected.PUT("/organizations/:id", s.updateOrganization)
+
+			// Locations
+			protected.GET("/locations", s.getLocations)
+			protected.POST("/locations", s.createLocation)
+			protected.GET("/locations/:id", s.getLocation)
+			protected.PUT("/locations/:id", s.updateLocation)
+			protected.DELETE("/locations/:id", s.deleteLocation)
+
+			// Items
+			protected.GET("/items", s.getItems)
+			protected.POST("/items", s.createItem)
+			protected.GET("/items/:id", s.getItem)
+			protected.PUT("/items/:id", s.updateItem)
+			protected.DELETE("/items/:id", s.deleteItem)
+
+			// Operations
+			protected.POST("/operations/place-item", s.placeItem)
+			protected.POST("/operations/move-item", s.moveItem)
+			protected.GET("/operations/search", s.search)
+
+			// Templates
+			protected.GET("/templates", s.getTemplates)
+			protected.POST("/templates/:id/apply", s.applyTemplate)
+		}
+	}
+}
+
+func (s *Server) healthCheck(c *gin.Context) {
+	c.JSON(http.StatusOK, gin.H{
+		"status": "ok",
+		"service": "erp-mvp-core",
+	})
+}
+
+// Placeholder handlers - will be implemented in next stages
+func (s *Server) register(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) login(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) authMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Auth not implemented yet"})
+		c.Abort()
+	}
+}
+
+func (s *Server) getOrganization(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) updateOrganization(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) getLocations(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) createLocation(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) getLocation(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) updateLocation(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) deleteLocation(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) getItems(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) createItem(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) getItem(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) updateItem(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) deleteItem(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) placeItem(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) moveItem(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) search(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) getTemplates(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) applyTemplate(c *gin.Context) {
+	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
+}
+
+func (s *Server) Start() error {
+	return s.router.Run(s.config.Server.Host + ":" + s.config.Server.Port)
+}
+
+func (s *Server) Shutdown(ctx context.Context) error {
+	// Graceful shutdown logic will be added later
+	return nil
+}