feat(localdb): rewire OperationTrackingStore onto the consolidated site database

Task 4 of the LocalDb Phase 1 adoption plan.

OperationTrackingStore took IOptions<OperationTrackingOptions> and opened its own
SqliteConnection from ConnectionString. It now takes ILocalDb and gets every
connection - writer and the two ad-hoc reader paths - from CreateConnection().

This is not cosmetic. OperationTracking is a RegisterReplicated table, so its
capture triggers call zb_hlc_next(). That UDF is registered per connection by
ILocalDb and by nothing else, so a raw SqliteConnection would fail closed on
every write. Connections from CreateConnection() also arrive already open -
calling Open()/OpenAsync() on one throws - hence the removed OpenAsync calls on
the reader paths.

OperationTrackingOptions.ConnectionString is now vestigial for this store; the
database location is LocalDb:Path. The options class stays (retention settings)
and the config key stays bound for the site config DB.

InitializeSchema is kept but is now always a no-op in the host: onReady runs
while ILocalDb is being constructed, strictly before this constructor can
receive it. It remains so a directly-constructed store (tests, tooling) is
self-sufficient.

Tests: the store fixture moves off mode=memory&cache=shared onto a real ILocalDb
over a temp file. There is no in-memory mode - LocalDbOptions.Path is a
filesystem path - and testing through a raw in-memory connection would no longer
resemble the host. Verifier connections stay raw on purpose: this fixture never
registers the table, so no trigger fires and the UDF is never reached.

Three DI fixtures needed LocalDb:Path added, because resolving
IOperationTrackingStore now forces ILocalDb construction:
SiteCompositionRootTests, SiteAuditWiringTests, and the AuditLog
CombinedTelemetryHarness.

Verified: build 0 warnings; Host 294/294, SiteRuntime 530/530, AuditLog 354/354.

Claude-Session: https://claude.ai/code/session_01BL2Vu1ESDQ9SCN4gVKkdts

tests/ZB.MOM.WW.ScadaBridge.Host.Tests/CompositionRootTests.cs

@@ -383,11 +383,13 @@ public class SiteCompositionRootTests : IDisposable
     private readonly WebApplication _host;
     private readonly string _tempDbPath;
     private readonly string _tempTrackingDbPath;
+    private readonly string _tempLocalDbPath;
 
     public SiteCompositionRootTests()
     {
         _tempDbPath = Path.Combine(Path.GetTempPath(), $"scadabridge_test_{Guid.NewGuid()}.db");
         _tempTrackingDbPath = Path.Combine(Path.GetTempPath(), $"scadabridge_track_{Guid.NewGuid()}.db");
+        _tempLocalDbPath = Path.Combine(Path.GetTempPath(), $"scadabridge_localdb_{Guid.NewGuid()}.db");
 
         var builder = WebApplication.CreateBuilder();
         builder.Configuration.Sources.Clear();
@@ -400,10 +402,13 @@ public class SiteCompositionRootTests : IDisposable
             ["ScadaBridge:Node:RemotingPort"] = "0",
             ["ScadaBridge:Node:GrpcPort"] = "0",
             ["ScadaBridge:Database:SiteDbPath"] = _tempDbPath,
-            // Point the site-local operation-tracking SQLite store (the ctor opens/creates
-            // the file eagerly) at a temp path so resolving IOperationTrackingStore in the
-            // composition-root test does not litter site-tracking.db in the test cwd.
+            // Retained for the site config DB; it no longer points the tracking store
+            // anywhere — that store now opens the consolidated database below.
             ["ScadaBridge:OperationTracking:ConnectionString"] = $"Data Source={_tempTrackingDbPath}",
+            // The consolidated site database. IOperationTrackingStore resolves ILocalDb
+            // and creates the file eagerly in its ctor, so this must be a temp path or
+            // the composition-root test litters the working directory.
+            ["LocalDb:Path"] = _tempLocalDbPath,
             // ClusterOptions requires at least one seed node (ClusterOptionsValidator).
             ["ScadaBridge:Cluster:SeedNodes:0"] = "akka.tcp://scadabridge@localhost:2551",
             ["ScadaBridge:Cluster:SeedNodes:1"] = "akka.tcp://scadabridge@localhost:2552",
@@ -427,6 +432,7 @@ public class SiteCompositionRootTests : IDisposable
         (_host as IDisposable)?.Dispose();
         try { File.Delete(_tempDbPath); } catch { /* best effort */ }
         try { File.Delete(_tempTrackingDbPath); } catch { /* best effort */ }
+        try { File.Delete(_tempLocalDbPath); } catch { /* best effort */ }
     }
 
     [Fact]