fix(pm): compress the handover reader's prose and fixtures to the claim's +120 line budget

No behaviour change: the same accept shape, the same refusals, the same
printed rule and remedy; docblocks and fixtures tightened (1091 self-test
cases, 1075 before).

Claude-Session: https://claude.ai/code/session_017ETYWqMQD4qMtZzAGovWNi
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude