Conformance: add fixture for hold -> mature -> commit_ok -> execute_ok

[safal207]

Goal

Add a conformance fixture for a held action that later becomes mature and executes only after commit.

Context

CaPU should support actions that are permitted but not ready yet:

valid -> permit -> hold -> mature -> commit_ok -> execute_ok

This is the positive counterpart to no-execute negative paths.

Suggested work

• Create an example/fixture where a valid record is held due to unmet context.
• Add a later condition or parent/context signal that makes it mature.
• Verify that execution occurs only after commit_ok.
• Add or update a test and expected output.

Acceptance criteria

• The fixture shows the held state clearly.
• The expected output includes no execute event before maturity and commit.
• The expected output includes execute only after commit_ok.
• Existing validation still passes.

Contributor level

Intermediate / tests + fixtures.

Why this helps community

This demonstrates that CaPU is not only a blocker. It can defer safely until the action becomes causally mature.