Joseph Doherty de110f8b42 feat(scaudit): SiteCallAuditActor minimum surface (#22, #23 M3) ...

Bundle C of Audit Log #23 M3.

Adds the ScadaLink.SiteCallAudit project + matching tests project, mirroring
the ScadaLink.AuditLog scaffolding pattern (net10.0, central package
management, InternalsVisibleTo to the tests assembly).

SiteCallAuditActor is the central singleton entry point for Site Call Audit
(#22): it receives UpsertSiteCallCommand and persists the SiteCall via
ISiteCallAuditRepository.UpsertAsync (monotonic, idempotent — out-of-order
or duplicate updates are silent no-ops at the repo). Audit-write failures
NEVER abort the user-facing action (CLAUDE.md): repository throws are
caught + logged, the actor replies Accepted=false, and the singleton stays
alive (Resume supervisor strategy as defence in depth).

Two constructors mirror AuditLogIngestActor:
- IServiceProvider production constructor resolves the scoped EF repository
  from a fresh DI scope per message.
- ISiteCallAuditRepository test constructor injects a concrete repository so
  the TestKit tests exercise the real monotonic-upsert SQL end to end.

UpsertSiteCallCommand + UpsertSiteCallReply live in ScadaLink.Commons (same
home as IngestAuditEventsCommand) so Bundle D's gRPC server can construct
them without taking a project reference on the actor's host project.

AddSiteCallAudit() is a placeholder for symmetry with AddAuditLog /
AddNotificationOutbox; Bundle F will populate it with the actor's Props
factory + options bindings.

Tests (Akka.TestKit.Xunit2 + MsSqlMigrationFixture via project ref to
ScadaLink.ConfigurationDatabase.Tests, mirroring Bundle D2):
- Receive_UpsertSiteCallCommand_Persists_Replies_Accepted
- Receive_DuplicateUpsert_OlderStatus_NoOp_StillRepliesAccepted (idempotency)
- Receive_RepoThrowsTransient_RepliesAccepted_False_ActorStaysAlive

Reconciliation, KPIs, and the central->site Retry/Discard relay are
deferred per CLAUDE.md scope discipline.

ScadaLink.slnx updated to include both new projects.

All 3 new tests pass against the running infra/mssql container; full suite
(2683 tests across 27 projects) passes with no regressions.

2026-05-20 14:18:49 -04:00

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