feat(operations): add always-execute option and latest cache reuse

[graham-chainlink]

What changed

• Added WithAlwaysExecute execute option to force operation execution and bypass previous successful report short-circuiting.
• Updated cached report lookup to prefer the most recent matching successful report.
• Added regression tests for forced re-execution and most-recent successful report reuse.
• Updated operations package docs usage examples to reflect the new option and current sequence behavior.

Why

• Some execution flows need deterministic re-runs rather than returning prior cached results.
• When cache reuse is enabled, returning the newest successful report provides expected and up-to-date behavior.

[changeset-bot]

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Latest commit: 2b36801

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