Implement updates for better performance

Author: abrar2030

code/backend/.npmrc

@@ -1,2 +1,2 @@
-# Hoist all packages to root node_modules — single install for all services
+# Hoist all packages to root node_modules - single install for all services
 legacy-peer-deps=true

code/backend/README.md

@@ -1,4 +1,4 @@
-# FinFlow Backend — Monorepo
+# FinFlow Backend - Monorepo
 
 A Node.js/TypeScript + Python microservices backend for the FinFlow financial platform.
 
@@ -79,11 +79,11 @@ cp .env.example .env
 
 Key variables:
 
-- `JWT_SECRET` — JWT signing secret
-- `DATABASE_URL` — PostgreSQL connection string
-- `REDIS_HOST` / `REDIS_PORT` — Redis connection
-- `KAFKA_BROKERS` — Kafka broker addresses
-- `STRIPE_SECRET` / `STRIPE_WEBHOOK_SECRET` — Stripe credentials
+- `JWT_SECRET` - JWT signing secret
+- `DATABASE_URL` - PostgreSQL connection string
+- `REDIS_HOST` / `REDIS_PORT` - Redis connection
+- `KAFKA_BROKERS` - Kafka broker addresses
+- `STRIPE_SECRET` / `STRIPE_WEBHOOK_SECRET` - Stripe credentials
 
 ## Docker
 

code/backend/__mocks__/mime.js

@@ -1,6 +1,6 @@
 "use strict";
 /**
- * __mocks__/mime.js  —  Combined mime v1 + v2 polyfill for Jest
+ * __mocks__/mime.js  -  Combined mime v1 + v2 polyfill for Jest
  *
  * WHY THIS EXISTS
  * ───────────────
@@ -76,7 +76,7 @@ for (const [ext, type] of Object.entries(EXT_TO_TYPE)) {
   if (!TYPE_TO_EXT[type]) TYPE_TO_EXT[type] = ext;
 }
 
-// Charsets for text types — used by express/send
+// Charsets for text types - used by express/send
 const CHARSET_MAP = {
   "text/html": "UTF-8",
   "text/plain": "UTF-8",
@@ -158,7 +158,7 @@ const charsets = {
   },
 };
 
-// ─── Export — all four entry points ──────────────────────────────────────────
+// ─── Export - all four entry points ──────────────────────────────────────────
 const mime = {
   // v2
   define,

code/backend/analytics-service/tests/analytics.integration.test.ts

@@ -19,7 +19,7 @@ jest.mock("../src/forecast.model");
 jest.mock("../../common/kafka", () => ({
   sendMessage: jest.fn().mockResolvedValue(undefined),
 }));
-// Explicit factory mock — more reliable than jest.mock("jsonwebtoken") + mockReturnValue
+// Explicit factory mock - more reliable than jest.mock("jsonwebtoken") + mockReturnValue
 // because clearMocks:true in jest.config.js would wipe auto-mock return values between tests.
 jest.mock("jsonwebtoken", () => ({
   verify: jest.fn().mockReturnValue({ sub: "user_123", role: "user" }),

code/backend/docker-compose.override.yml

@@ -1,7 +1,7 @@
 version: "3.9"
 
 # ============================================================
-# Development overrides — hot reload, exposed ports, debug
+# Development overrides - hot reload, exposed ports, debug
 # ============================================================
 
 services:

code/backend/nginx.conf

@@ -88,7 +88,7 @@ http {
             add_header Content-Type application/json;
         }
 
-        # Auth routes — tighter rate limit
+        # Auth routes - tighter rate limit
         location /api/auth/ {
             limit_req zone=auth burst=10 nodelay;
             proxy_pass http://auth_service;
@@ -182,7 +182,7 @@ http {
             proxy_read_timeout 30s;
         }
 
-        # Default — 404
+        # Default - 404
         location / {
             return 404 '{"error":"Route not found"}';
             add_header Content-Type application/json;

code/backend/payments-service/src/interfaces/payment-processor.interface.ts

@@ -4,7 +4,7 @@ export type ProcessorMetadata = Record<
   string | number | boolean | null | undefined
 >;
 
-/** Generic processor response — processors return different shapes; callers should narrow */
+/** Generic processor response - processors return different shapes; callers should narrow */
 export interface ProcessorResult {
   id: string;
   status: string;

code/backend/payments-service/src/payment.service.ts

@@ -64,7 +64,7 @@ class PaymentService {
   }
 
   /**
-   * Process a payment — validates details then charges via the processor.
+   * Process a payment - validates details then charges via the processor.
    * This is the method integration and unit tests expect.
    */
   async processPayment(paymentDetails: {

code/backend/run/nginx.local.conf

@@ -88,7 +88,7 @@ http {
             add_header Content-Type application/json;
         }
 
-        # Auth routes — tighter rate limit
+        # Auth routes - tighter rate limit
         location /api/auth/ {
             limit_req zone=auth burst=10 nodelay;
             proxy_pass http://auth_service;
@@ -182,7 +182,7 @@ http {
             proxy_read_timeout 30s;
         }
 
-        # Default — 404
+        # Default - 404
         location / {
             return 404 '{"error":"Route not found"}';
             add_header Content-Type application/json;

code/ml-services/ai-features-service/src/services/cash_flow_service.py

@@ -10,7 +10,6 @@
 """
 
 import logging
-
 # --- Inline dependency stubs ---
 from datetime import datetime, timedelta
 from typing import Any, Dict, List
@@ -19,7 +18,6 @@
 import pandas as pd
 
 
-
 async def get_database():
     """Stub: replace with real async DB client."""
 
@@ -120,7 +118,8 @@ class CashFlowPredictionResponse:
     Prophet = None  # type: ignore
 
 try:
-    from sklearn.ensemble import GradientBoostingRegressor, RandomForestRegressor
+    from sklearn.ensemble import (GradientBoostingRegressor,
+                                  RandomForestRegressor)
     from sklearn.linear_model import Ridge
     from sklearn.preprocessing import MinMaxScaler, StandardScaler
 except ImportError: