Hangfire.SqlServer 1.7.3

https://www.hangfire.io/blog/ Please see https://docs.hangfire.io/en/latest/upgrade-guides/upgrading-to-hangfire-1.7.html to learn how to upgrade from 1.6.X. 1.7.3 • Fixed – Wrong error message in migration script, when @CurrentSchemaVersion has a NULL value (by @penenkel). 1.7.2 • Fixed – Occasional "DataException: Error parsing column" error when using blocking fetch. 1.7.1 • Changed – Use blocking fetch implementation only for sub-second polling intervals. • Fixed – Don't fail with an exception when can't connect to MSSQL instance during start-up. • Fixed – Don't access the `JobQueue` table when using blocking query and don't have results. 1.7.0 • Added – Full .NET Core 2.0 support by explicitly targeting .NET Standard 2.0. • Added – `Schema 7` migration to fix the `IX_HangFire_Set_Score` index to include the `Key` column. • Added – `Schema 6` migration with less indexes, better physical layout and `bigint` support (disabled by default). • Added – Blocking fetch support for sliding expiration-based fetch to avoid excessive polling. • Added – `SqlServerStorageOptions.EnableHeavyMigrations` switch to automatically install even heavy migrations. • Added – `SqlServerStorageOptions.DisableGlobalLocks` property to avoid custom locking scheme. • Added – `SqlServerStorageOptions.UsePageLocksOnDequeue` property to use less CPU consuming fetch. • Added – Callback method to allow to open the database with impersonation (by @BjoernHund). • Added – `SqlServerStorageOptions.UseRecommendedIsolationLevel` option to set the minimum possible level. • Changed – Identity columns either converted to the `bigint` type, or entirely removed. • Changed – Clustered indexes were organized according to the access patterns of their tables. • Changed – Most of secondary indexes were either removed or made filtered. • Changed – Optimize sliding-expiration-based fetching to use even less CPU time. • Changed – Use write reordering and fine-grained locking scheme to improve parallelism. • Changed – Monitoring API doesn't check state data to see state transition time. • Changed – Allow to use zero-based poll interval when sliding invisibility timeout. • Changed – Short paths for the `CreateExpiredJob` method to avoid some round-trips. • Changed – Set `SqlParameter` types explicitly to not to duplicate query plans. • Changed – Batch support for `AddToQueue` method when default provider is used. • Changed – Check `FetchedAt` has expected value to prevent prolonging others' work. • Changed – Use more recent Dapper 1.50.7 on all platforms except .NET Framework 4.5. • Changed – Dapper package is internalized now even on .NET Core to avoid possible conflicts. • Fixed – Avoid unnecessary waits in state changer when job was already expired. • Fixed – Cannot resolve the collation conflict in `CountersAggregator`. • Fixed – Background processing stops when identity columns exceed the `Int32.MaxValue`. • Fixed – Slowdown of scheduled jobs due to the missing index on the `[Set]` table.