fix(historian): SQL quality contract, long-name refusal, info-bit masking, AtTime-after-now, bootstrap hardening

- I-1: an Empty sample is always Bad. The writer stores a non-Bad NaN/Inf as
  Empty+BadOutOfRange and any other non-Bad Empty as BadNoData; the updater
  refuses a non-Bad Empty with BadInvalidArgument; reads clamp a legacy
  non-Bad Empty row to BadNoData (Raw and AtTime).
- Tag/source names over 400 chars are refused, never truncated: writer
  per-tag failure, updater BadInvalidArgument, reads not-found, events none.
- HistorianInfoBits masks the historian bits before setting one.
- AtTime past now, stepped from the last sample => UncertainDataSubNormal.
- Bootstrapper: logger, 5 s negative cache, ClearPool + Warning when
  sp_releaseapplock fails.
- Provider builds its shared state lazily (an invalid Schema no longer
  throws at Resolve); Kinds is a FrozenSet; Gateway reuses the recorder's
  DefaultSupportedKinds.
- Cleanup: SqlHistorianDataTypes in its own file (updater dup removed),
  dead Invalidate and unused status consts deleted, named severity masks,
  alarm writer brace.

Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Historian.SqlServer.IntegrationTests/RawReadTests.cs

@@ -42,8 +42,9 @@ internal sealed class ReadTestDb
         return new ReadTestDb(o, conn, boot);
     }
 
-    /// <summary>A fresh data source (fresh catalog cache) over this schema.</summary>
-    public SqlServerHistorianDataSource Source() => new(Conn, Boot, new SqlServerTagCatalog(Conn, Boot));
+    /// <summary>A fresh data source (fresh catalog cache) over this schema; <paramref name="clock"/> is its "now".</summary>
+    public SqlServerHistorianDataSource Source(TimeProvider? clock = null) =>
+        new(Conn, Boot, new SqlServerTagCatalog(Conn, Boot), timeProvider: clock);
 
     /// <summary>Inserts a tag row and the given samples. ServerTimeUtc = source time + 1 s (so tests can tell them apart).</summary>
     public async Task<int> SeedAsync(string tag, params (DateTime T, HistorianValue V, uint Status)[] samples)
@@ -237,7 +238,8 @@ public sealed class RawReadTests(SqlHistorianFixture fx)
             ConnectionString = fx.ConnectionString, Schema = SqlHistorianFixture.UniqueSchema(), AutoCreateSchema = false,
         };
         var conn = new SqlHistorianConnection(o);
-        var boot = new SqlServerSchemaBootstrapper(conn, o);
+        var clock = new FixedClock(DateTimeOffset.UtcNow);
+        var boot = new SqlServerSchemaBootstrapper(conn, o, timeProvider: clock);
         var src = new SqlServerHistorianDataSource(conn, boot, new SqlServerTagCatalog(conn, boot));
 
         await Should.ThrowAsync<HistorianSchemaMissingException>(() => src.ReadRawAsync("A", At(0), At(1), 0, Ct));
@@ -251,6 +253,7 @@ public sealed class RawReadTests(SqlHistorianFixture fx)
         // Another node creates the schema; the same data source then succeeds (bootstrap failure is not latched).
         var creator = new SqlServerHistorianOptions { ConnectionString = o.ConnectionString, Schema = o.Schema };
         await new SqlServerSchemaBootstrapper(new SqlHistorianConnection(creator), creator).EnsureAsync(Ct);
+        clock.Now += SqlServerSchemaBootstrapper.FailureCacheDuration; // past the 5 s failure cache (M-2)
         (await src.ReadRawAsync("A", At(0), At(1), 0, Ct)).Samples.ShouldBeEmpty();
         src.GetHealthSnapshot().ConsecutiveFailures.ShouldBe(0);
     }