Add routers table, entity, repository and GET endpoint

src/main/java/com/litoralregas/openvpn/router/Router.java

@@ -0,0 +1,24 @@
+package com.litoralregas.openvpn.router;
+
+import jakarta.persistence.*;
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "routers")
+public class Router {
+
+    @Id
+    private UUID id;
+
+    private String name;
+    private String serialNumber;
+    private String lanIp;
+    private String lanSubnet;
+    private String status;
+
+    private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
+
+    // getters and setters (for now, no Lombok)
+}

src/main/java/com/litoralregas/openvpn/router/RouterController.java

@@ -0,0 +1,21 @@
+package com.litoralregas.openvpn.router;
+
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/routers")
+public class RouterController {
+
+    private final RouterRepository repository;
+
+    public RouterController(RouterRepository repository) {
+        this.repository = repository;
+    }
+
+    @GetMapping
+    public List<Router> getAll() {
+        return repository.findAll();
+    }
+}

src/main/java/com/litoralregas/openvpn/router/RouterRepository.java

@@ -0,0 +1,7 @@
+package com.litoralregas.openvpn.router;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import java.util.UUID;
+
+public interface RouterRepository extends JpaRepository<Router, UUID> {
+}

src/main/resources/db/migration/V2__routers_table.sql

@@ -0,0 +1,10 @@
+CREATE TABLE routers (
+    id UUID PRIMARY KEY,
+    name VARCHAR(120) NOT NULL,
+    serial_number VARCHAR(120),
+    lan_ip VARCHAR(50) NOT NULL,
+    lan_subnet VARCHAR(50) NOT NULL,
+    status VARCHAR(40) NOT NULL DEFAULT 'PENDING',
+    created_at TIMESTAMP NOT NULL DEFAULT now(),
+    updated_at TIMESTAMP NOT NULL DEFAULT now()
+);