V2.x landing plan

In pre versions, the contract may still have frequent updates. Try to make it stable and then merge to open source.

Apr: v2.0.0-pre.1( selected sources/sinks; no plugin; no graph )

• Define contracts during dev (still subject to change)
• Sink split with MQTT
• Adapt file sink
• Source split with MQTT
• Format, Compressor, Encryptor modularize

May: v2.0.0-pre.2 (no native plugin; no graph)

• Schama map (big change) with node level
• REST API redesign
• Portable plugin adapt to new contract
• Sources adapt to new contract
• Sinks adapt to new contract

Jun: 2.0.0

• Finalize plugin contract and adapt all shipped plugins
• Graph API support
• Resource manager
• Testing recover
• CI, especially plugin packaging