Reorganize cargo-make task structure

[yvette-carlisle]

Summary

• reorganize cargo-make tasks by action-family boundaries and canonical action-first names
• move long Docker/live benchmark task logic into scripts while keeping stable cargo-make entrypoints
• update README, docs, CI, fixtures, and tests for renamed commands

Validation

• cargo make fmt-check
• cargo make check
• git diff --check
• task ordering and stale-command scans