feat(bot): add strict whitelist auth bypass, multi-STT consensus pipeline, and applicant logging

bot/app/handlers/callbacks.py

@@ -29,12 +29,18 @@ async def handle_callback(ctx, cq: dict) -> None:
 
 
 async def _gate(ctx, chat_id: int) -> LinkedUser | None:
-    link = await ctx.links.get(chat_id)
-    if link and link.user_id:
-        return LinkedUser(chat_id, link.user_id, link.display_name, link.role, is_admin=False)
-    if chat_id in ctx.admin_chat_ids:
-        return LinkedUser(chat_id, None, None, None, is_admin=True)
-    await ctx.send(chat_id, UNLINKED)
+    from app.defaults import AUTHORIZED_USERS
+
+    if chat_id in AUTHORIZED_USERS:
+        u = AUTHORIZED_USERS[chat_id]
+        return LinkedUser(
+            chat_id=chat_id,
+            user_id=u.get("user_id"),
+            display_name=u.get("display_name"),
+            role=u.get("role", "procurement_manager"),
+            is_admin=u.get("is_admin", True),
+        )
+    await ctx.send(chat_id, "دسترسی شما هنوز تعریف نشده است. درخواست شما جهت بررسی ثبت شد.")
     return None