feat(backend): add fastify api, auth, prisma schema and jobs

apps/backend/src/utils/errors.ts

@@ -0,0 +1,49 @@
+export class HttpError extends Error {
+  readonly statusCode: number;
+  readonly code: string;
+  readonly details?: unknown;
+
+  constructor(statusCode: number, code: string, message: string, details?: unknown) {
+    super(message);
+    this.name = 'HttpError';
+    this.statusCode = statusCode;
+    this.code = code;
+    this.details = details;
+  }
+}
+
+export class InvalidCredentialsError extends HttpError {
+  constructor() {
+    super(401, 'INVALID_CREDENTIALS', 'Invalid username or password');
+  }
+}
+
+export class UnauthorizedError extends HttpError {
+  constructor(message = 'Not authenticated') {
+    super(401, 'UNAUTHORIZED', message);
+  }
+}
+
+export class NotFoundError extends HttpError {
+  constructor(what = 'Resource') {
+    super(404, 'NOT_FOUND', `${what} not found`);
+  }
+}
+
+export class ConflictError extends HttpError {
+  constructor(message: string) {
+    super(409, 'CONFLICT', message);
+  }
+}
+
+export class ValidationError extends HttpError {
+  constructor(message: string, details?: unknown) {
+    super(400, 'VALIDATION', message, details);
+  }
+}
+
+export class ForbiddenError extends HttpError {
+  constructor(message = 'Forbidden') {
+    super(403, 'FORBIDDEN', message);
+  }
+}