feat(logging): add debug logs for key validation and request handling

- Add debug logs for invalid and valid API key masking
- Log unsupported content types in middleware
- Log forwarded request URLs and response statuses from LT server

src/ltProxyAuth.ts

@@ -1,5 +1,6 @@
 import { Middleware } from 'http-kernel/Types/mod.ts';
 import { Env } from './env.ts';
+import { maskApiKey } from './utils.ts';
 
 /**
  * Middleware that checks for a valid API key via form param.
@@ -17,12 +18,15 @@ export const authMiddleware: Middleware = async (ctx, next) => {
         const key = params.get('apiKey');
 
         if (!key || !Env.apiKeys.includes(key)) {
+            console.debug('Invalid API key:', maskApiKey(key));
             return new Response('Forbidden – Invalid API key', { status: 403 });
         }
     } else {
+        console.debug('Unsupported content type:', contentType);
         return new Response('Unsupported content type', { status: 415 });
     }
 
+    console.debug('Valid API key:', maskApiKey(ctx.req.headers.get('apiKey')));
     return await next();
 };
 

src/ltProxyHandler.ts

@@ -37,12 +37,16 @@ export const handler: Handler = async (ctx) => {
     const headers = new Headers(ctx.req.headers);
     headers.delete('content-length');
 
+    console.debug('Forwarding request to:', proxyUrl.toString());
+
     const forwarded = await fetch(proxyUrl.toString(), {
         method: ctx.req.method,
         headers,
         body,
     });
 
+    console.debug('Received response from LT server:', forwarded.status);
+
     const respHeaders = new Headers(forwarded.headers);
     return new Response(forwarded.body, {
         status: forwarded.status,