perf(site-runtime): instance reconcile sweep reads metadata only and fetches config_json just for the instances it repairs (review 2026-10-21 01/SR-P1)

Adds SiteStorageService.GetAllDeployedConfigMetadataAsync. The sweep decides
from the projection, then fetches single rows for its starts/restarts off-
thread and re-validates them (generation guard, revision match, pipeline/
running guards), releasing the per-revision claim of any repair that does
not act. Boot load unchanged.

tests/ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests/Persistence/SiteStorageServiceTests.cs

@@ -147,6 +147,29 @@ public class SiteStorageServiceTests : IAsyncLifetime, IDisposable
         Assert.Null(result);
     }
 
+    /// <summary>
+    /// Review 2026-10-21 01/SR-P1: the all-rows metadata projection the instance sweep reads
+    /// carries the same identity as the full read, for every row, without the config blob.
+    /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
+    [Fact]
+    public async Task GetAllDeployedConfigMetadataAsync_MatchesTheFullReadForEveryRow()
+    {
+        await _storage.StoreDeployedConfigAsync(
+            "Pump1", "{\"test\":true}", "dep-001", "sha256:abc", isEnabled: true);
+        await _storage.StoreDeployedConfigAsync(
+            "Pump2", "{\"other\":1}", "dep-002", "sha256:def", isEnabled: false);
+
+        var metadata = (await _storage.GetAllDeployedConfigMetadataAsync())
+            .OrderBy(m => m.InstanceUniqueName).ToList();
+        var full = (await _storage.GetAllDeployedConfigsAsync())
+            .OrderBy(c => c.InstanceUniqueName).ToList();
+
+        Assert.Equal(
+            full.Select(c => (c.InstanceUniqueName, c.DeploymentId, c.RevisionHash, c.IsEnabled)),
+            metadata.Select(m => (m.InstanceUniqueName, m.DeploymentId, m.RevisionHash, m.IsEnabled)));
+    }
+
     /// <summary>Verifies that a metadata read returns the same identity as reading all configs and picking the match.</summary>
     /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]