Plugin selection and shared behavior

Choose a plugin by business action, then prepare resources. Plugin switches, definition enablement, manual execution and scheduling are separate layers. Saving publishes a task version without running it. Files/interpreters belong to the executing Worker or explicit remote resource.

Timeout/stop/retry do not roll back external effects. Plan idempotency and business verification for writes. Logs, variables, row counts and consumer confirmations prove different facts.

Documentation version 1.0.0. Replace sample paths, resources and ports with those of your own environment.