Metrics should show for imported OTEL data older than 12 hours

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

When importing OpenTelemetry (OTEL) data into the Aspire Dashboard, metrics are not displayed on the Metrics page if the imported data is older than 12 hours.
This makes it difficult to analyze historical datasets, even though the data import itself appears to succeed.

### Describe the solution you'd like

When importing OTEL data, the dashboard could:
Automatically adjust the time range to match the imported dataset, for example:
Set the end time to the latest (max) timestamp found in the imported data.

Alternatively:
Detect when no data is present in the current time window and suggest adjusting the time range.
Provide a "data time range" filter.

### Additional context

_No response_