[5/5] Make SDK evolution operator workflow actionable

[ebarti]

Summary

• make every supported operator command use a locked uv environment and the matching runtime extra
• require explicit candidate inspection for actionable report and implementation passes
• document deterministic behavior-summary handoff and stop conditions
• add structural command-conformance tests that reject bare, compound, commented, echoed, or runtime/extra-mismatched examples

Stack

This is PR 5 of 5 and is based on agent/sdk-evolution-cli-bin-snapshots.

Validation

• uv lock --check
• uv run --locked ruff check .
• uv run --locked mypy
• uv run --locked pytest -q: 491 passed, 8 skipped
• focused operator-doc conformance: 14 passed
• ordinary correctness review: clean after two repair passes