feat: add StepFailed opcode

[Linell]

EXE-255: Python SDK

Related To

inngest#2992

[Copilot]

Pull Request Overview

This PR adds support for the StepFailed opcode to properly handle steps that have exhausted their retry attempts. The implementation distinguishes between retryable step errors and final failures.

• Adds StepFailed opcode and error code to handle final step failures
• Implements logic to check if maximum attempts are reached and raise StepFailed instead of StepError
• Extends server request context to include max_attempts field

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
step_sync.py	Adds logic to detect final attempt and raise StepFailed error with new opcode
step_async.py	Mirror implementation of step failure logic for async operations
execution_request.py	Adds max_attempts field to server request context
consts.py	Defines new STEP_FAILED error code and opcode constants
errors.py	Implements StepFailed error class as non-retryable StepError

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[amh4r]

Can delete this now!

[amh4r]

Can delete this too

[amh4r]

Suggested change

	raise base.ResponseInterrupt(
	base.StepResponse(original_error=err, step=step_info)
	)

Not needed since we're already raising below