feat: add processor service with Redis-backed job queue

- Introduced a new `processor` service in the Docker Compose setup to handle face matching jobs.
- Configured Redis as a job queue and state management system for processing searches.
- Updated the backend to enqueue jobs and manage user locks using Redis.
- Added environment variables for Redis configuration and runtime paths.
- Created technical design documentation for the processor service outlining architecture, queue model, and search lifecycle.
- Updated package.json and package-lock.json to include dependencies for BullMQ and ioredis in the processor workspace.
- Added sample PKL files for local testing in the `test_pkl` directory.

faceai/apps/backend/src/store.js

@@ -34,8 +34,6 @@ export const mockCatalog = {
 };
 
 const sessions = new Map();
-const searches = new Map();
-const results = new Map();
 
 export function createSession(session) {
   const sessionId = randomId('sess');
@@ -49,62 +47,3 @@ export function createSession(session) {
 export function getSession(sessionId) {
   return sessions.get(sessionId) || null;
 }
-
-export function createSearch({ raceId, user, selfieName, returnUrl, lang }) {
-  const searchId = randomId('search');
-  searches.set(searchId, {
-    id: searchId,
-    raceId,
-    user,
-    selfieName,
-    returnUrl,
-    lang,
-    status: 'processing',
-    createdAt: Date.now(),
-    completedAt: null,
-    resultId: null,
-    matches: []
-  });
-  return searches.get(searchId);
-}
-
-export function getSearch(searchId) {
-  return searches.get(searchId) || null;
-}
-
-export function completeSearch(searchId) {
-  const search = searches.get(searchId);
-  if (!search) {
-    return null;
-  }
-
-  const race = mockCatalog[search.raceId];
-  const matches = (race?.photos || []).slice(0, Math.min(4, race?.photos?.length || 0));
-  const resultId = randomId('result');
-
-  results.set(resultId, {
-    id: resultId,
-    raceId: search.raceId,
-    raceName: race?.name || search.raceId,
-    userId: search.user.id,
-    returnUrl: search.returnUrl,
-    lang: search.lang,
-    matches,
-    createdAt: Date.now()
-  });
-
-  const completed = {
-    ...search,
-    status: 'completed',
-    completedAt: Date.now(),
-    resultId,
-    matches
-  };
-
-  searches.set(searchId, completed);
-  return completed;
-}
-
-export function getResult(resultId) {
-  return results.get(resultId) || null;
-}