Add timestamp to logs

tl;dr Add date / time logging to entries output. Use UTC for consistency and optionally make this a flag.

Currently when running DAB, especially in development, I get logs like this:

info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
Request starting HTTP/1.1 GET http://localhost:5000/graphql/service-worker.js - - -
dbugdbug: Azure.DataApiBuilder.Core.AuthenticationHelpers.ClientRoleHeaderAuthenticationMiddleware[0]
bfa3a6ee-7f10-41ba-8899-2e0990428aa0 AuthN state: Anonymous. Role: Anonymous. Scheme: UnauthenticatedAuthentication
: Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware[3]
The request path does not match the path filter
dbug: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1001]
2 candidate(s) found for the request path '/graphql/service-worker.js'
dbug: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1005]
Endpoint 'Hot Chocolate GraphQL Pipeline' with route pattern '/graphql/{**slug}' is valid for the request path '/graphql/service-worker.js'

This is a fraction of what is logged for a request. However, trying to determine which new entries have occurred is hard and slow, even with AI LLM help. It would be nice to mark each of these with a timestamp, as mocked here.

2026/07/07 08:01:01.344 info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
Request starting HTTP/1.1 GET http://localhost:5000/graphql/service-worker.js - - -
2026/07/07 08:01:01.345 dbugdbug: Azure.DataApiBuilder.Core.AuthenticationHelpers.ClientRoleHeaderAuthenticationMiddleware[0]
bfa3a6ee-7f10-41ba-8899-2e0990428aa0 AuthN state: Anonymous. Role: Anonymous. Scheme: UnauthenticatedAuthentication
: Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware[3]
The request path does not match the path filter
2026/07/07 08:01:01.347 dbug: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1001]
2 candidate(s) found for the request path '/graphql/service-worker.js'
2026/07/07 08:01:01.348 dbug: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1005]
Endpoint 'Hot Chocolate GraphQL Pipeline' with route pattern '/graphql/{**slug}' is valid for the request path '/graphql/service-worker.js'