Wire auth middleware into all products, add docker-compose and init-db script

- Auth middleware (JWT + API key + RBAC) copied into P3/P4/P5/P6
- All server entry points now register auth hooks + auth routes
- Webhook and Slack endpoints skip JWT auth (use HMAC/signature)
- docker-compose.yml: shared Postgres + Redis + Meilisearch, all 4 Node products as services
- init-db.sh: creates per-product databases and runs migrations
- P1 (Rust) and P2 (Go agent) run standalone, not in compose

products/03-alert-intelligence/src/auth/middleware.ts

@@ -0,0 +1,122 @@
+import { z } from 'zod';
+import jwt from 'jsonwebtoken';
+import type { FastifyInstance, FastifyRequest, FastifyReply } from 'fastify';
+import pino from 'pino';
+
+const logger = pino({ name: 'auth' });
+
+export interface AuthPayload {
+  tenantId: string;
+  userId: string;
+  email: string;
+  role: 'owner' | 'admin' | 'member' | 'viewer';
+}
+
+/**
+ * JWT auth middleware. Extracts tenant context from Bearer token.
+ * Also supports API key auth via `X-API-Key` header (dd0c_ prefix).
+ */
+export function registerAuth(app: FastifyInstance, jwtSecret: string, pool: any) {
+  app.decorateRequest('tenantId', '');
+  app.decorateRequest('userId', '');
+  app.decorateRequest('userRole', 'viewer');
+
+  app.addHook('onRequest', async (req: FastifyRequest, reply: FastifyReply) => {
+    // Skip health check
+    if (req.url === '/health') return;
+    // Skip webhook endpoints (they use HMAC auth)
+    if (req.url.startsWith('/webhooks/')) return;
+    // Skip Slack endpoints (they use Slack signature)
+    if (req.url.startsWith('/slack/')) return;
+
+    const apiKey = req.headers['x-api-key'] as string | undefined;
+    const authHeader = req.headers['authorization'];
+
+    if (apiKey) {
+      // API key auth: dd0c_ prefix + 32 hex chars
+      if (!apiKey.startsWith('dd0c_') || apiKey.length !== 37) {
+        return reply.status(401).send({ error: 'Invalid API key format' });
+      }
+
+      const prefix = apiKey.slice(0, 13); // dd0c_ + 8 hex chars for fast lookup
+      // TODO: Look up by prefix, bcrypt compare full key
+      // For now, reject — real implementation needs DB lookup
+      return reply.status(401).send({ error: 'API key auth not yet implemented' });
+    }
+
+    if (authHeader?.startsWith('Bearer ')) {
+      const token = authHeader.slice(7);
+      try {
+        const payload = jwt.verify(token, jwtSecret) as AuthPayload;
+        (req as any).tenantId = payload.tenantId;
+        (req as any).userId = payload.userId;
+        (req as any).userRole = payload.role;
+        return;
+      } catch (err) {
+        return reply.status(401).send({ error: 'Invalid or expired token' });
+      }
+    }
+
+    return reply.status(401).send({ error: 'Missing authentication' });
+  });
+}
+
+/**
+ * Role-based access control check.
+ * Use in route handlers: requireRole(req, reply, 'admin')
+ */
+export function requireRole(req: FastifyRequest, reply: FastifyReply, minRole: AuthPayload['role']): boolean {
+  const hierarchy: Record<string, number> = { owner: 4, admin: 3, member: 2, viewer: 1 };
+  const userLevel = hierarchy[(req as any).userRole] ?? 0;
+  const requiredLevel = hierarchy[minRole] ?? 0;
+
+  if (userLevel < requiredLevel) {
+    reply.status(403).send({ error: `Requires ${minRole} role or higher` });
+    return false;
+  }
+  return true;
+}
+
+/**
+ * Generate a JWT token (for login/signup endpoints).
+ */
+export function signToken(payload: AuthPayload, secret: string, expiresIn = '24h'): string {
+  return jwt.sign(payload, secret, { expiresIn });
+}
+
+/**
+ * Login endpoint registration.
+ */
+const loginSchema = z.object({
+  email: z.string().email(),
+  password: z.string().min(8),
+});
+
+const signupSchema = z.object({
+  email: z.string().email(),
+  password: z.string().min(8),
+  tenant_name: z.string().min(1).max(100),
+});
+
+export function registerAuthRoutes(app: FastifyInstance, jwtSecret: string, pool: any) {
+  app.post('/api/v1/auth/login', async (req, reply) => {
+    const body = loginSchema.parse(req.body);
+    // TODO: Look up user by email, bcrypt compare password
+    // For now, return placeholder
+    return reply.status(501).send({ error: 'Login not yet implemented' });
+  });
+
+  app.post('/api/v1/auth/signup', async (req, reply) => {
+    const body = signupSchema.parse(req.body);
+    // TODO: Create tenant + user, hash password with bcrypt
+    return reply.status(501).send({ error: 'Signup not yet implemented' });
+  });
+
+  app.get('/api/v1/auth/me', async (req, reply) => {
+    return {
+      tenant_id: (req as any).tenantId,
+      user_id: (req as any).userId,
+      role: (req as any).userRole,
+    };
+  });
+}