Update Khoj cloud trial period to a fortnight instead of a week

- Improve rate limit error message wording
- Make the "too many requests" error message more robust. Should throw
  that exception fix self.request >= self.subscribed_requests because
  upgrading wouldn't fix this rate limiting

src/khoj/database/adapters/__init__.py

@@ -219,7 +219,7 @@ def subscription_to_state(subscription: Subscription) -> str:
         return SubscriptionState.INVALID.value
     elif subscription.type == Subscription.Type.TRIAL:
         # Trial subscription is valid for 7 days
-        if datetime.now(tz=timezone.utc) - subscription.created_at > timedelta(days=7):
+        if datetime.now(tz=timezone.utc) - subscription.created_at > timedelta(days=14):
             return SubscriptionState.EXPIRED.value
 
         return SubscriptionState.TRIAL.value

src/khoj/routers/helpers.py

@@ -430,14 +430,14 @@ class ApiUserRateLimiter:
         if subscribed and count_requests >= self.subscribed_requests:
             raise HTTPException(status_code=429, detail="Slow down! Too Many Requests")
         if not subscribed and count_requests >= self.requests:
-            if self.subscribed_requests == self.requests:
+            if self.requests >= self.subscribed_requests:
                 raise HTTPException(
                     status_code=429,
                     detail="Slow down! Too Many Requests",
                 )
             raise HTTPException(
                 status_code=429,
-                detail="We're glad you're enjoying Khoj! You've exceeded your usage limit for today. Come back tomorrow or subscribe to increase your rate limit via [your settings](https://app.khoj.dev/config).",
+                detail="We're glad you're enjoying Khoj! You've exceeded your usage limit for today. Come back tomorrow or subscribe to increase your usage limit via [your settings](https://app.khoj.dev/config).",
             )
 
         # Add the current request to the cache
@@ -476,7 +476,7 @@ class ConversationCommandRateLimiter:
         if not subscribed and count_requests >= self.trial_rate_limit:
             raise HTTPException(
                 status_code=429,
-                detail=f"We're glad you're enjoying Khoj! You've exceeded your `/{conversation_command.value}` command usage limit for today. You can increase your rate limit via [your settings](https://app.khoj.dev/config).",
+                detail=f"We're glad you're enjoying Khoj! You've exceeded your `/{conversation_command.value}` command usage limit for today. Subscribe to increase your usage limit via [your settings](https://app.khoj.dev/config).",
             )
         await UserRequests.objects.acreate(user=user, slug=command_slug)
         return