v2.3.2: arch doc drift fix, scythe fenced code block linting, harness quick-facts

Fixed

• Fixed documentation drift in docs/arch/akiflow.md across transcript layout, domain consults, and gate pointers.
• Updated the akiflow architecture diagram to include the dispatch shape and mechanical verification gates.
• Corrected legacy references (akirule-enforcer, gate law #4) in README.md, akilint, and harness-facts.md.
• Enhanced scythe.py to lint comments inside fenced code blocks in markdown.

Changed

• Added a Worker invocation quick-facts lookup table to harness-facts.md with explicit cross-file locks.
• Standardized model tier rules in aki-hands with clear default and escalation boundaries.

Full Changelog: 2.3.1...2.3.2