Phase 6.1 Stream E (data layer) — DriverInstanceResilienceStatus entity + DriverResilienceStatusTracker + EF migration

Ships the data + runtime layer of Stream E. The SignalR hub and Blazor /hosts
page refresh (E.2-E.3) are follow-up work paired with the visual-compliance
review per Phase 6.4 patterns — documented as a deferred follow-up below.

Configuration:
- New entity DriverInstanceResilienceStatus with:
  DriverInstanceId, HostName (composite PK),
  LastCircuitBreakerOpenUtc, ConsecutiveFailures, CurrentBulkheadDepth,
  LastRecycleUtc, BaselineFootprintBytes, CurrentFootprintBytes,
  LastSampledUtc.
- Separate from DriverHostStatus (per-host connectivity view) so a Running
  host that has tripped its breaker or is nearing its memory ceiling shows up
  distinctly on Admin /hosts. Admin page left-joins both for display.
- OtOpcUaConfigDbContext + Fluent-API config + IX_DriverResilience_LastSampled
  index for the stale-sample filter query.
- EF migration: 20260419124034_AddDriverInstanceResilienceStatus.

Core.Resilience:
- DriverResilienceStatusTracker — process-singleton in-memory tracker keyed on
  (DriverInstanceId, HostName). CapabilityInvoker + MemoryTracking +
  MemoryRecycle callers record failure/success/breaker-open/recycle/footprint
  events; a HostedService (Stream E.2 follow-up) samples this tracker every
  5 s and persists to the DB. Pure in-memory keeps tests fast + the core
  free of EF/SQL dependencies.

Tests:
- DriverResilienceStatusTrackerTests (9 new, all pass): tryget-before-write
  returns null; failures accumulate; success resets; breaker/recycle/footprint
  fields populate; per-host isolation; snapshot returns all pairs; concurrent
  writes don't lose counts.
- SchemaComplianceTests: expected-tables list updated to include the new
  DriverInstanceResilienceStatus table.

Full solution dotnet test: 1042 passing (baseline 906, +136 for Phase 6.1 so
far across Streams A/B/C/D/E.1). Pre-existing Client.CLI Subscribe flake
unchanged.

Deferred to follow-up PR (E.2/E.3):
- ResilienceStatusPublisher HostedService that samples DriverResilienceStatusTracker
  every 5 s + upserts DriverInstanceResilienceStatus rows.
- Admin FleetStatusHub SignalR hub pushing LastCircuitBreakerOpenUtc /
  CurrentBulkheadDepth / LastRecycleUtc on change.
- Admin /hosts Blazor column additions (red badge when
  ConsecutiveFailures > breakerThreshold / 2). Visual-compliance reviewer
  signoff alongside Phase 6.4 admin-ui patterns.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ZB.MOM.WW.OtOpcUa.Configuration/Migrations/OtOpcUaConfigDbContextModelSnapshot.cs

@@ -434,6 +434,45 @@ namespace ZB.MOM.WW.OtOpcUa.Configuration.Migrations
                         });
                 });
 
+            modelBuilder.Entity("ZB.MOM.WW.OtOpcUa.Configuration.Entities.DriverInstanceResilienceStatus", b =>
+                {
+                    b.Property<string>("DriverInstanceId")
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<string>("HostName")
+                        .HasMaxLength(256)
+                        .HasColumnType("nvarchar(256)");
+
+                    b.Property<long>("BaselineFootprintBytes")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("ConsecutiveFailures")
+                        .HasColumnType("int");
+
+                    b.Property<int>("CurrentBulkheadDepth")
+                        .HasColumnType("int");
+
+                    b.Property<long>("CurrentFootprintBytes")
+                        .HasColumnType("bigint");
+
+                    b.Property<DateTime?>("LastCircuitBreakerOpenUtc")
+                        .HasColumnType("datetime2(3)");
+
+                    b.Property<DateTime?>("LastRecycleUtc")
+                        .HasColumnType("datetime2(3)");
+
+                    b.Property<DateTime>("LastSampledUtc")
+                        .HasColumnType("datetime2(3)");
+
+                    b.HasKey("DriverInstanceId", "HostName");
+
+                    b.HasIndex("LastSampledUtc")
+                        .HasDatabaseName("IX_DriverResilience_LastSampled");
+
+                    b.ToTable("DriverInstanceResilienceStatus", (string)null);
+                });
+
             modelBuilder.Entity("ZB.MOM.WW.OtOpcUa.Configuration.Entities.Equipment", b =>
                 {
                     b.Property<Guid>("EquipmentRowId")