feat: update ai-mailer

hosts/fw/modules/ai-mailer.nix

@@ -27,9 +27,9 @@
 
       ai:
         openrouter_api_key: "file://${config.sops.secrets.ai-mailer-openrouter-key.path}"
-        model: "deepseek/deepseek-r1-distill-llama-70b"
+        model: "openai/gpt-5-mini"
         temperature: 0.3
-        max_tokens: 100000
+        max_tokens: 200000
 
       context:
         urls:
@@ -47,6 +47,10 @@
       polling:
         interval: "300s"
 
+      processing:
+        max_tokens: 30000
+        skip_junk_emails: false
+
       logging:
         level: "info"
         file_path: "/var/log/ai-mailer/ai-mailer.log"