Implement Redis rate limiting middleware for spam endpoints (FRE-4507)

- Add ioredis dependency to API package
- Create Redis connection utility (apps/api/src/config/redis.ts)
- Create Redis-backed spam rate limit middleware with per-minute and daily limits
- Create spam classification routes (SMS, number reputation, call analysis, feedback)
- Register middleware and routes in API server
- Add 7 passing tests for rate limit enforcement
- Update vitest config with required env vars

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/routes/spamshield.routes.ts

@@ -0,0 +1,201 @@
+import { FastifyInstance, FastifyRequest, FastifyReply } from 'fastify';
+import {
+  numberReputationService,
+  smsClassifierService,
+  callAnalysisService,
+  spamFeedbackService,
+} from '../services/spamshield';
+
+export async function spamshieldRoutes(fastify: FastifyInstance) {
+  // Classify SMS text
+  fastify.post('/sms/classify', async (request: FastifyRequest, reply: FastifyReply) => {
+    const authReq = request as FastifyRequest & { user?: { id: string } };
+    const userId = authReq.user?.id;
+
+    if (!userId) {
+      return reply.code(401).send({ error: 'User ID required' });
+    }
+
+    const body = request.body as { text: string };
+
+    if (!body.text || typeof body.text !== 'string') {
+      return reply.code(400).send({ error: 'text is required' });
+    }
+
+    try {
+      const result = await smsClassifierService.classify(body.text);
+      return reply.send({
+        classification: {
+          isSpam: result.isSpam,
+          confidence: result.confidence,
+          spamFeatures: result.spamFeatures,
+        },
+      });
+    } catch (error) {
+      const message = error instanceof Error ? error.message : 'Classification failed';
+      return reply.code(422).send({ error: message });
+    }
+  });
+
+  // Check number reputation
+  fastify.post('/number/reputation', async (request: FastifyRequest, reply: FastifyReply) => {
+    const authReq = request as FastifyRequest & { user?: { id: string } };
+    const userId = authReq.user?.id;
+
+    if (!userId) {
+      return reply.code(401).send({ error: 'User ID required' });
+    }
+
+    const body = request.body as { phoneNumber: string };
+
+    if (!body.phoneNumber || typeof body.phoneNumber !== 'string') {
+      return reply.code(400).send({ error: 'phoneNumber is required' });
+    }
+
+    try {
+      const result = await numberReputationService.checkReputation(body.phoneNumber);
+      return reply.send({
+        reputation: {
+          isSpam: result.isSpam,
+          confidence: result.confidence,
+          spamType: result.spamType,
+          reportCount: result.reportCount,
+        },
+      });
+    } catch (error) {
+      const message = error instanceof Error ? error.message : 'Reputation check failed';
+      return reply.code(422).send({ error: message });
+    }
+  });
+
+  // Analyze incoming call
+  fastify.post('/call/analyze', async (request: FastifyRequest, reply: FastifyReply) => {
+    const authReq = request as FastifyRequest & { user?: { id: string } };
+    const userId = authReq.user?.id;
+
+    if (!userId) {
+      return reply.code(401).send({ error: 'User ID required' });
+    }
+
+    const body = request.body as {
+      phoneNumber: string;
+      duration?: number;
+      callTime: string;
+      isVoip?: boolean;
+    };
+
+    if (!body.phoneNumber || !body.callTime) {
+      return reply.code(400).send({ error: 'phoneNumber and callTime are required' });
+    }
+
+    try {
+      const result = await callAnalysisService.analyzeCall({
+        phoneNumber: body.phoneNumber,
+        duration: body.duration,
+        callTime: new Date(body.callTime),
+        isVoip: body.isVoip,
+      });
+      return reply.send({
+        analysis: {
+          decision: result.decision,
+          confidence: result.confidence,
+          reasons: result.reasons,
+        },
+      });
+    } catch (error) {
+      const message = error instanceof Error ? error.message : 'Call analysis failed';
+      return reply.code(422).send({ error: message });
+    }
+  });
+
+  // Record spam feedback
+  fastify.post('/feedback', async (request: FastifyRequest, reply: FastifyReply) => {
+    const authReq = request as FastifyRequest & { user?: { id: string } };
+    const userId = authReq.user?.id;
+
+    if (!userId) {
+      return reply.code(401).send({ error: 'User ID required' });
+    }
+
+    const body = request.body as {
+      phoneNumber: string;
+      isSpam: boolean;
+      confidence?: number;
+      metadata?: Record<string, unknown>;
+    };
+
+    if (!body.phoneNumber || typeof body.isSpam !== 'boolean') {
+      return reply.code(400).send({ error: 'phoneNumber and isSpam are required' });
+    }
+
+    try {
+      const feedback = await spamFeedbackService.recordFeedback(
+        userId,
+        body.phoneNumber,
+        body.isSpam,
+        body.confidence,
+        body.metadata
+      );
+      return reply.code(201).send({
+        feedback: {
+          id: feedback.id,
+          phoneNumber: feedback.phoneNumber,
+          isSpam: feedback.isSpam,
+          createdAt: feedback.createdAt,
+        },
+      });
+    } catch (error) {
+      const message = error instanceof Error ? error.message : 'Feedback recording failed';
+      return reply.code(422).send({ error: message });
+    }
+  });
+
+  // Get spam history
+  fastify.get('/history', async (request: FastifyRequest, reply: FastifyReply) => {
+    const authReq = request as FastifyRequest & { user?: { id: string } };
+    const userId = authReq.user?.id;
+
+    if (!userId) {
+      return reply.code(401).send({ error: 'User ID required' });
+    }
+
+    const query = request.query as {
+      limit?: string;
+      isSpam?: string;
+      startDate?: string;
+    };
+
+    const results = await spamFeedbackService.getSpamHistory(userId, {
+      limit: query.limit ? parseInt(query.limit, 10) : undefined,
+      isSpam: query.isSpam !== undefined ? query.isSpam === 'true' : undefined,
+      startDate: query.startDate ? new Date(query.startDate) : undefined,
+    });
+
+    return reply.send({
+      history: results.map((r) => ({
+        id: r.id,
+        phoneNumber: r.phoneNumber,
+        isSpam: r.isSpam,
+        createdAt: r.createdAt,
+      })),
+    });
+  });
+
+  // Get spam statistics
+  fastify.get('/statistics', async (request: FastifyRequest, reply: FastifyReply) => {
+    const authReq = request as FastifyRequest & { user?: { id: string } };
+    const userId = authReq.user?.id;
+
+    if (!userId) {
+      return reply.code(401).send({ error: 'User ID required' });
+    }
+
+    try {
+      const stats = await spamFeedbackService.getStatistics(userId);
+      return reply.send({ statistics: stats });
+    } catch (error) {
+      const message = error instanceof Error ? error.message : 'Statistics retrieval failed';
+      return reply.code(422).send({ error: message });
+    }
+  });
+}