Make audit reconciliation writes portable across relational providers

[cdcavell]

Summary

• Replace SQL Server-specific reconciliation updates with EF Core ExecuteUpdateAsync operations.
• Generate reconciliation insert statements from EF Core model metadata and provider-specific identifier quoting.
• Keep all inserted values parameterized while preserving conditional inserts, concurrency checks, and rollback behavior.
• Update reconciliation tests to recognize writes regardless of provider identifier syntax.

Validation

• Ran dotnet format ./NetCoreApplicationTemplate.slnx.
• Ran dotnet restore ./NetCoreApplicationTemplate.slnx
• Ran dotnet build ./NetCoreApplicationTemplate.slnx -c Release --no-restore
• Ran dotnet test ./NetCoreApplicationTemplate.slnx -c Release --no-restore --no-build

Test run summary: Passed!
  total: 469
  failed: 0
  succeeded: 469
  skipped: 0
  duration: 24s 522ms

[Copilot]

Copilot review overview

🟢 Approval recommended

The changed persistence and test paths are consistent with the existing model, transaction, and concurrency behavior.

Review effort: Lite
Findings: None

What changed in this PR

This PR makes audit reconciliation writes provider-portable while preserving concurrency checks, parameterization, and transaction behavior.

Changes:

• Replaces SQL Server-specific updates with ExecuteUpdateAsync.
• Generates parameterized inserts from EF Core metadata and provider quoting.
• Updates tests to recognize provider-specific identifier quoting.

File	Description
ApplicationAuditReconciler.cs	Implements portable reconciliation updates and inserts.
ApplicationAuditReconciliationTests.cs	Makes write interception provider-agnostic.

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