rpa-bot-handoff: short skill, MEK SOP as the model

The skill itself read as too detailed. SKILL.md is now a short checklist
(460 words, was 1,321): 5 steps, 5 rules, and 6 one-line "don't miss"
checks that replace the 12 Tebra failure classes (failure-classes.md
removed). The MEK Charge Reconciliation SOP - the 3-page PDF ops liked -
replaces the Tebra example as the model (emails swapped for examples).
New test keeps SKILL.md under 500 words with 6 checks.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/adr/0005-handover-is-a-short-sop.md

@@ -8,4 +8,6 @@ Supersedes ADR-0004.
 
 **Accuracy instead of length:** every quoted message, label and URL is checked against the code before handover, and messages the code builds from parts show those parts in italics. The SOP must say what clicking Run again does to the data (fresh run on current data, previous results deleted or kept).
 
-**Kept from ADR-0004:** the operator's words only, every wait is a number from the code, misleading statuses are called out where they show, the bot is never run, and the 12 failure classes are still checked during the scan so no problem type is missed.
+**Kept from ADR-0004:** the operator's words only, every wait is a number from the code, misleading statuses are called out where they show, the bot is never run, and the bot is checked for every common problem type.
+
+**Shorter skill (Oct 2026):** the user found the skill itself too detailed. SKILL.md is now a short checklist (under 500 words), the 12 Tebra failure classes are folded into 6 one-line "don't miss" checks, and the MEK Charge Reconciliation SOP (the 3-page PDF ops liked) replaces the Tebra example as the model.