fix(server): remove duplicate passwordAttemptLimiter declaration in rateLimiter.js

[Git-Shubham14]

Description

Fixes #215

server/middleware/rateLimiter.js declared passwordAttemptLimiter twice using export const, causing a SyntaxError: Identifier 'passwordAttemptLimiter' has already been declared crash on every server startup.

Root Cause

• Line 45: export const passwordAttemptLimiter = rateLimit({...}) — correct declaration
• Line 57: export const passwordAttemptLimiter = rateLimit({...}) — identical duplicate, accidentally added

JavaScript ESM does not allow two const declarations with the same name in the same scope.

Changes

• server/middleware/rateLimiter.js — removed the second identical duplicate declaration of passwordAttemptLimiter at lines 57-68

Type of Change

• Bug fix

Checklist

• Code follows project style
• Tested locally — server starts without errors after fix
• Updated documentation

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