Enhance pipeline functionality and access to pods

[eywalker]

Improvements include:

• reordering tag columns in the table preview (fixes PLT-417)
• refining the function pod decorator (fixes PLT-418)
• enabling independent execution engine options for each pipeline node (fixes PLT-421)
• providing easier access to source, function, and operator pods within the pipeline (fixes PLT-422).
• fixing bug in stale caching when using run_async (fixes PLT-426)
• enable auto-selecting asynchronous run when the execution engine supports it (fixes PLT-425)

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