fix(registry): preserve username case for ECR compatibility (#4632) (#4647)

Remove .toLowerCase() transform from registryUsernameSchema.
AWS ECR requires the username to be exactly 'AWS' (uppercase) for
authentication. Docker Hub usernames are case-insensitive for login,
so preserving case is safe for all providers.

Closes #4632

apps/dokploy/__test__/registry/registry-schema.test.ts

@@ -0,0 +1,75 @@
+import { apiCreateRegistry, apiTestRegistry } from "@dokploy/server/db/schema";
+import { describe, expect, it } from "vitest";
+
+describe("Registry Schema - Username case preservation (#4632)", () => {
+	const validBase = {
+		registryName: "AWS ECR",
+		password: "dXNlcm5hbWU6cGFzc3dvcmQ=", // dummy base64 token
+		registryUrl: "123456789.dkr.ecr.us-east-1.amazonaws.com",
+		registryType: "cloud" as const,
+		imagePrefix: null,
+	};
+
+	it("should preserve uppercase username (AWS ECR requires 'AWS')", () => {
+		const result = apiCreateRegistry.safeParse({
+			...validBase,
+			username: "AWS",
+		});
+		expect(result.success).toBe(true);
+		if (result.success) {
+			expect(result.data.username).toBe("AWS");
+		}
+	});
+
+	it("should not lowercase mixed-case usernames", () => {
+		const result = apiCreateRegistry.safeParse({
+			...validBase,
+			username: "MyUser",
+		});
+		expect(result.success).toBe(true);
+		if (result.success) {
+			expect(result.data.username).toBe("MyUser");
+		}
+	});
+
+	it("should still trim whitespace from username", () => {
+		const result = apiCreateRegistry.safeParse({
+			...validBase,
+			username: "  AWS  ",
+		});
+		expect(result.success).toBe(true);
+		if (result.success) {
+			expect(result.data.username).toBe("AWS");
+		}
+	});
+
+	it("should reject empty username", () => {
+		const result = apiCreateRegistry.safeParse({
+			...validBase,
+			username: "",
+		});
+		expect(result.success).toBe(false);
+	});
+
+	it("should also preserve case in apiTestRegistry", () => {
+		const result = apiTestRegistry.safeParse({
+			...validBase,
+			username: "AWS",
+		});
+		expect(result.success).toBe(true);
+		if (result.success) {
+			expect(result.data.username).toBe("AWS");
+		}
+	});
+
+	it("should accept lowercase usernames too (backward compat)", () => {
+		const result = apiCreateRegistry.safeParse({
+			...validBase,
+			username: "myuser",
+		});
+		expect(result.success).toBe(true);
+		if (result.success) {
+			expect(result.data.username).toBe("myuser");
+		}
+	});
+});