Changes and removals for Oban 3.0 [HOLD]

[sorentwo]

To be changed before Oban 3.0:

Defaults

• [ ] Use scheduled_at as unique timestamp by default

Normalization

• [ ] Normalize telemetry states from executor (success => completed, etc)
• [ ] Normalize database states from drain_queue/1 (discard => discarded, success => completed, etc.)
• [ ] Remove Oban.Migrations alias

Config

• [ ] Remove :discard and {:discard, reason} return values
• [ ] Remove top-level crontab option
• [ ] Remove support for Oban.Queue.BasicEngine name
• [ ] Remove support for Oban.Plugins.Stager config
• [ ] Remove Oban.PostgresNotifier name
• [ ] Remove top-level circuit_backoff option
• [ ] Remove use of DYNO for node name

Plugins

• [ ] Remove Reindexer plugin
• [ ] Remove Repeater plugin
• [ ] Remove Gossip plugin

Schema / Database

• [ ] Collapse migrations

Queue

• [ ] Remove producer telemetry event

Telemetry

• [ ] Default to structured logs, not JSON in default logger

⚠️ This is for tracking purposes as we have no intention of releasing 3.0 soon. Please do not send PRs!