feat: model overload error

docker-compose.yml

···
     environment:
       - "AUTHORIZED_USERS=${AUTHORIZED_USERS}"
       - "SERVICE=${SERVICE:?https://bsky.social}"
-      - "DB_PATH=sqlite.db"
+      - DB_PATH=/data/sqlite.db
       - "GEMINI_MODEL=${GEMINI_MODEL:-gemini-2.5-flash}"
       - "DID=${DID:?}"
       - "HANDLE=${HANDLE:?}"
···
       - "GEMINI_API_KEY=${GEMINI_API_KEY:?}"
       - "USE_JETSTREAM=${USE_JETSTREAM:-false}"
     volumes:
-      - aero_db:/sqlite.db
+      - "aero_db:/data"
+
+volumes:
+  aero_db:

src/core.ts

···
 export const QUOTA_EXCEEDED_MESSAGE =
     "You have exceeded your daily message quota (15). Please wait 24 hours before trying again.";
 
+export const ERROR_MESSAGE =
+    "Sorry, I ran into an issue analyzing that post. Please try again.";
+
 export const UNAUTHORIZED_MESSAGE =
     "I can’t make sense of your noise just yet. You’ll need to be whitelisted before I can help.";
 

src/handlers/messages.ts

···
                 });
             }
         }
-    } catch (error) {
+    } catch (error: any) {
         logger.error("Error in post handler:", error);
+        let errorMsg = c.ERROR_MESSAGE;
+
+        if (error.error.code == 503) {
+            errorMsg =
+                "Sorry, the AI model is currently overloaded. Please try again later.";
+        }
 
         await conversation.sendMessage({
-            text:
-                "Sorry, I ran into an issue analyzing that post. Please try again.",
+            text: errorMsg,
         });
     }
 }

src/utils/conversation.ts

···
 import { conversations, messages } from "../db/schema";
 import { and, eq } from "drizzle-orm";
 import { env } from "../env";
-import { bot, MAX_GRAPHEMES } from "../core";
+import { bot, ERROR_MESSAGE, MAX_GRAPHEMES } from "../core";
 import { parsePost, parsePostImages, traverseThread } from "./post";
 
 /*
···
         };
     } catch (e) {
         convo.sendMessage({
-            text:
-                "Sorry, I ran into an issue analyzing that post. Please try again.",
+            text: ERROR_MESSAGE,
         });
 
         throw new Error("Failed to parse conversation");

src/utils/post.ts

···
   ) return undefined;
 
   const record = (post.embed as RecordEmbed || RecordWithMediaEmbed).record;
-  console.log("embed: ", post.embed);
-  console.log("record: ", record);
   const embedPost = await c.bot.getPost(record.uri);
 
   return await parsePost(embedPost, false);
···
     }
   }
 
-  return images.map((image, idx) => parseImage(image, idx + 1));
+  return images.map((image, idx) => parseImage(image, idx + 1)).filter((img) =>
+    img.alt.length > 0
+  );
 }
 
 function parseImage(image: EmbedImage, index: number) {