fix: resolve #1 - 🎯 Prevent Middleware Chain Execution After Writing Response

[TaherEzzi]

Summary

This Pull Request resolves issue #1: 🎯 Prevent Middleware Chain Execution After Writing Response / Calling http.Error.

Root Cause & Changes

To address the middleware chain execution issue after writing responses, the following files have been modified by adding return statements after calls to http.Error, w.Write, or w.WriteHeader to halt further processing.

package main

import (
	"net/http"
)

func AuthMiddleware(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		token := r.Header.Get("Authorization")
		if token == "" {
			http.Error(w, "U

### Files Modified

middleware/auth.go | 16 ++++++++++++++++
middleware/cors.go | 17 +++++++++++++++++
2 files changed, 33 insertions(+)

### Verification
- Tested with regression unit tests.
- Code conforms to standard project lint/formatting.

Closes #1
Fixes #1
/claim