Joseph Doherty 7173a79ad7 feat(auditlog): SqliteAuditWriter schema bootstrap (#23) ...

Adds the site-side SqliteAuditWriter skeleton with schema bootstrap —
20-column AuditLog table + IX_SiteAuditLog_ForwardState_Occurred index +
PRAGMA auto_vacuum = INCREMENTAL — and the SqliteAuditWriterOptions
companion type. Mirrors the SiteEventLogger pattern: single owned
SqliteConnection serialised behind a write lock; the Channel-based
hot-path lands in Bundle B-T2.

Adds Microsoft.Data.Sqlite + Microsoft.Extensions.Logging.Abstractions
project refs to ScadaLink.AuditLog; adds Microsoft.Data.Sqlite +
Microsoft.Extensions.Logging.Abstractions + NSubstitute test refs.

Tests (3 new, total 13 -> 16):
- Opens_Creates_AuditLog_Table_With_20Columns_And_PK_On_EventId
- Opens_Creates_IX_ForwardState_Occurred_Index
- PRAGMA_auto_vacuum_Is_INCREMENTAL

2026-05-20 12:17:02 -04:00

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