### Check for existing issues

- [x] I have searched the existing issues and checked that my issue is not a duplicate.

### What happened?

When a budget is configured to reset daily (e.g. budget_duration: "1d"), the `projected_exceeded_date` still calculates based on days remaining in the month, not the current day. This causes misleading alerts that show the budget will be exceeded on a day in the future, when in reality the budget resets at midnight.

### Steps to Reproduce

1. Creates a key with a daily reset period and a budget of $10 2. Configure alerting (Slack) to receive `projected_limit_exceeded` alerts 3. Make API requests using the generated key to accumulate spend 4. Observe the alert

### Relevant log output

```shell

```

### What part of LiteLLM is this about?

Proxy

### What LiteLLM version are you on ?

v1.85.1

### Twitter / LinkedIn details

_No response_