docs(skills): state the hours-table naming rule as a suffix pattern, not one name

Review point: the rule read `SLA_CALENDAR_HOURS`, a concrete table name, where the
spec is a naming pattern. A published skill is copied verbatim by agents, so a
non-SLA hours table would have inherited the SLA name. The pattern now leads and
the concrete name is the parenthesised example. Same three lines, same +4 net.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018dxq7YqsLDMeZDZ5AzsgJX

Author: claude

skills/objectstack-data/references/data-hooks.md

@@ -453,8 +453,8 @@ The body runs in an isolated QuickJS VM, **not** Node:
   hook as a bundled `handler`.
 
 > **A deadline stamped from an hours table is calendar hours** — nights, weekends and
-> holidays count. Name it `SLA_CALENDAR_HOURS` (or its camelCase) and add elapsed
-> milliseconds (`hours * 3_600_000`); never label it "business hours".
+> holidays count. Name it `*_CALENDAR_HOURS` (`SLA_CALENDAR_HOURS`, or its camelCase)
+> and add elapsed milliseconds (`hours * 3_600_000`); never label it "business hours".
 
 ### ⚠️ Gotcha 1 — `ctx.result` is a *partial* record on afterUpdate