Add propulsion_scheduler_busy metrics; Rebase SqlStreamStore on Propulsion.Feed

See ChangeLog

Added

• Streams: Added propulsion_scheduler_busy metrics: count and seconds #126

Changed

• Feed.PeriodicSource: Add readTranches parameter to Pump #130
• Feed.PeriodicSource: Add TrancheId parameter to crawl #130
• CosmosStore: Target Equinox.CosmosStore v 3.0.5
• SqlStreamStore: Rebase on Propulsion.Feed.FeedSource #131

Removed

• net461 support #123

Fixed

• StreamsProjector: Fix failure to pump batches when using maxReadAhead of Int32.MaxValue #124

Targets (granularly) Equinox.CosmosStore 3.0.5, Equinox.Cosmos 2.6.0, Equinox.EventStore 2.6.0, SqlStreamStore 1.2.0-beta.8, FsCodec 2.0.0, FsKafka 1.7.x, Microsoft.Azure.Cosmos v 3.22.0, Microsoft.Azure.DocumentDB.ChangeFeedProcessor v 2.2.8, prometheus-net v 3.6.0