chore[security]: /api/chat/** 추가

Author: yongho9064

backend/src/main/java/com/ai/lawyer/global/security/SecurityConfig.java

@@ -40,13 +40,14 @@ public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Excepti
                         .frameOptions(HeadersConfigurer.FrameOptionsConfig::sameOrigin)
                 )
                 .authorizeHttpRequests(authorize -> authorize
-                        .requestMatchers("/api/auth/**", "/api/public/**").permitAll()
+                        .requestMatchers("/api/auth/**", "/api/public/**", "/api/chat/**").permitAll()
                         .requestMatchers("/v3/api-docs/**", "/swagger-ui/**", "/swagger-ui.html").permitAll()
                         .requestMatchers("/api/posts/**").permitAll()
                         .requestMatchers("/api/precedent/**").permitAll()
                         .requestMatchers("/api/law/**").permitAll()
                         .requestMatchers("/api/law-word/**").permitAll()
                         .requestMatchers("/h2-console/**").permitAll()
+                        .requestMatchers("/api/chat/**").authenticated()
                         .anyRequest().authenticated()
                 )
                 // JWT 필터 추가