Fix: Access to Swagger UI when login enabled (#5194)

Fixes for /swagger-ui/index.html & /v1/api-docs endpoints not being
accessible when login was enabled.

- `UserAuthenticationFilter.isPublicAuthEndpoint()` had gaps in its
check, missing `/v1/api-docs`
- Refactored `UserAuthenticationFilter` to use
`RequestUriUtils.isPublicAuthEndpoint()` instead of its own incorrect
method

Closes #5125 & #5028

---

### Testing (if applicable)

- [x] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

app/common/src/main/java/stirling/software/common/util/RequestUriUtils.java

@@ -162,10 +162,9 @@ public class RequestUriUtils {
                 // enableLogin)
                 || trimmedUri.startsWith(
                         "/api/v1/ui-data/footer-info") // Public footer configuration
-                || trimmedUri.startsWith("/v1/api-docs")
                 || trimmedUri.startsWith("/api/v1/invite/validate")
                 || trimmedUri.startsWith("/api/v1/invite/accept")
-                || trimmedUri.contains("/v1/api-docs");
+                || trimmedUri.startsWith("/v1/api-docs");
     }
 
     private static String stripContextPath(String contextPath, String requestURI) {