fix(agy-acp)!: default prompt timeout to twenty minutes (#1534)

* fix(agy-acp)!: default prompt timeout to twenty minutes

Preserve explicit timeout overrides in both CLI forms and document migration back to five minutes.

* refactor(agy-acp): name default timeout and clarify extra args

* test(agy-acp): document invalid timeout override contract

release: v0.10.0-beta.4 (#1526)

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release: v0.10.0-beta.4 (#1526)

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release: v0.10.0-beta.3 (#1466)

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release: v0.10.0-beta.3 (#1466)

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release: v0.10.0-beta.2 (#1445)

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release: v0.10.0-beta.2 (#1445)

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release: v0.10.0-beta.1 (#1433)

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release: v0.10.0-beta.1 (#1433)

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release: v0.9.0 (#1426)

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