Add DynamoDB

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• Add dynamodb-local, dynamodb-admin for docker compose
• Add skeleton Equinox.DynamoStore packages
• Add dynamo command line support to samples and eqx tool
• Add docs to README
• Equinox V4 cleanup
  • Consider neutral IEventData<ReadOnlyMemory> codec for ESDB and DDB?
• Equinox.DynamoStore: Port logic from .CosmosStore
  • Add concurrent metrics support to FSAWSDDB Add per-Operation collector parameter fsprojects/FSharp.AWS.DynamoDB#41
    • cleaned up by @samritchie in Reverted metricsCollector back to TableContext level (rather than per-operation) fsprojects/FSharp.AWS.DynamoDB#45_
  • Clean provisioning in Clarify ctor/Creation/Verification lifecycle fsprojects/FSharp.AWS.DynamoDB#43
    • Add DDB Streams Config logic to FSAWSDDB in Clarify ctor/Creation/Verification lifecycle fsprojects/FSharp.AWS.DynamoDB#43
    • Awaiting merge and/or release
  • Add TryGetItemAsync Add TryGetItemAsync fsprojects/FSharp.AWS.DynamoDB#42
  • Add CollectionFixture to manage auto-provisioning of test tables
  • Basic roundtrips
  • Tip splits
  • Port Pruning (#ifdef'd out atm)
  • Remove unused lazy initialization gate
  • Make Tip splits transactional
  • Remove assumptions of bodies being UTF-8 or JSON
  • Add compression for data and unfolds
  • Re-implement Events.Sync (see #ifdef APPEND_SUPPORT) ?
  • Port CosmosCoreEvents / CosmosCoreIntegration ?
• Add Equinox.DynamoStore.Prometheus
  • Split R vs W RU
• Propulsion.DynamoStore.Lambda: Implement DDB Streams Lambda to materialize a CosmosDB-feature compatible change feed
  • Index c field so EventType can be surfaced efficiently
• Propulsion.DynamoStore: DynamoStoreSource to consume from the index
  • Enhance logging detail for feed infrastructure
  • Provide facility for loading event bodies just in time
  • Provide ability to start Reading Events from Tail of Index
• Merge ESDB and DDB PRs, Upload -beta nugets
• Figure out a good way to provision Propulsion.DynamoStore.Lambda into an environment
  • Figure out how to monitor and/or prevent writes if Lambda is stuck
  • Implement bulk (re)indexing logic based on S3 export?
• Release final nugets

🙏 for lots of excellent research carried out by @pierregoudjo under the F# mentorship program i.e., https://github.com/pierregoudjo/dynamodb_conditional_writes

re #76

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This is now pretty complete - waiting on fsprojects/FSharp.AWS.DynamoDB#48 and the release of FsCodec 3.0-rc.2 and some general cleanup before actually merging the PRs (atm it requires an adjacent FSAWSDDB branch to compile)