refactor(config): drop the dead DriverInstanceResilienceStatus table (#524)

The sibling of #521's DriverHostStatus, dead for exactly the same reason. Before this change the
only reference in the entire repo was the DriverInstanceResilienceStatuses DbSet declaration: no
writer, no reader, and the table empty on every deployment.

Its entity doc described two components that were never built — a HostedService sampling the
tracker every ~5 s into this table, and an AdminUI that left-joined it on DriverHostStatus for
display. There is no sampler, that join exists in no razor file, and DriverHostStatus itself was
removed in #521.

Per-cluster mesh Phase 4 also makes the design unbuildable now: AddOtOpcUaConfigDb is gated on the
admin role, so a driver-only node has no ConfigDb connection to write rows with. Any per-node
runtime-status table has this problem.

The live data was never missing — it just does not go through SQL. Resilience counters reach the
AdminUI's DriverStatusPanel as DriverResilienceStatusChanged over the driver-resilience-status
telemetry channel into the in-memory IDriverResilienceStatusStore. Verified consumed: the panel
injects the store, fed by both DriverResilienceStatusBridge (DPS) and TelemetryDialSupervisor
(gRPC).

If breaker HISTORY across a central restart is ever wanted — the one thing the last-value-only
store cannot give — it needs a CENTRAL-side writer fed by that stream, never a driver-node writer.
Keeping an empty table now bought nothing toward that.

Migration DropDriverInstanceResilienceStatusTable; the scaffolder's data-loss warning cannot bite
on a table nothing ever inserted into, and Down() recreates it exactly.

Also corrected: DriverResilienceStatusTracker's doc-comment claimed CurrentInFlight fed
DriverInstanceResilienceStatus.CurrentBulkheadDepth "until the full telemetry observer lands". The
observer landed in Phase 5; the table never had a writer.

Claude-Session: https://claude.ai/code/session_015p7wGqy3YpZNCpDzTpGMKo

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

@@ -471,45 +471,6 @@ 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")