Phase 1a: shared schemas, service layer, server tooling

- shared/schemas/: move Zod schemas out of routes so client + server share them
- shared/types.ts: inferred types and enums for cross-package use
- server tsconfig rootDir raised to ".." so shared/ compiles in-tree
- server/src/services/: ticket, comment, cti, user, auth, notification (stub), search (stub)
- Routes thinned to validate-delegate-return; business logic now testable in isolation
- server/src/lib/httpError.ts: typed HttpError replaces ad-hoc throw shapes
- server/src/lib/logger.ts: pino structured logging replaces console.log
- autoClose job delegates to ticketService.closeStale()
- express-rate-limit on /api/auth/login (10 / 15min / IP)
- vitest + vitest-mock-extended; 20 service-level tests cover auth, ticket, comment, user flows
- CI: lint + test jobs before docker builds

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

shared/schemas/enums.ts

@@ -0,0 +1,14 @@
+import { z } from 'zod';
+
+export const ROLES = ['ADMIN', 'AGENT', 'USER', 'SERVICE'] as const;
+export const TICKET_STATUSES = ['OPEN', 'IN_PROGRESS', 'RESOLVED', 'CLOSED'] as const;
+
+export const roleSchema = z.enum(ROLES);
+export const ticketStatusSchema = z.enum(TICKET_STATUSES);
+
+export type Role = (typeof ROLES)[number];
+export type TicketStatus = (typeof TICKET_STATUSES)[number];
+
+export const SEVERITY_MIN = 1;
+export const SEVERITY_MAX = 5;
+export const severitySchema = z.number().int().min(SEVERITY_MIN).max(SEVERITY_MAX);