Restarting indexing in a composite view, the delay in seconds should not be negative

**Describe the bug**
```
{
"@context": [
"https://bluebrain.github.io/nexus/contexts/metadata.json",
"https://bluebrain.github.io/nexus/contexts/search.json",
"https://bluebrain.github.io/nexus/contexts/statistics.json"
],
"_total": 1,
"_results": [
{
"sourceId": "https://bluebrain.github.io/nexus/vocabulary/searchSource",
"projectionId": "https://bluebrain.github.io/nexus/vocabulary/searchProjection",
"delayInSeconds": -8983125,
"discardedEvents": 2170,
"evaluatedEvents": 135,
"failedEvents": 0,
"lastEventDateTime": "2022-11-15T15:13:26.624Z",
"lastProcessedEventDateTime": "2023-02-27T14:32:11.271Z",
"processedEvents": 2305,
"remainingEvents": 5958,
"totalEvents": 8263
}
```
The instant in the progress may not be correctly updated ?

No source file or test is named. Start by tracing how composite-view indexing calculates the progress response, using the reported delayInSeconds, lastEventDateTime, and lastProcessedEventDateTime values as a reproduction guide. Done means restarting indexing no longer produces a negative delay and the behavior is covered by an appropriate regression test.

Written by the indexing model from the issue text.