fix(framework): per-session ticket files unblock parallel sessions [#439]

The ticket gate required the single .crush/active-ticket file, so two
concurrent sessions overwrote each other's ticket mid-work. The gate now
accepts any non-empty .crush/active-ticket* file; each session keeps its
own (e.g. active-ticket-plant, active-ticket-core). Also prune .crush/
session scratch from both shellcheck scanners so one session's throwaway
probe scripts cannot block the other session's commits. Documented in
AGENTS.md Task Tracking.

💘 Generated with Crush

Assisted-by: Crush:glm-5.2

scripts/check-rules.sh

@@ -41,7 +41,7 @@ TODAY="$(date +%Y-%m-%d)"
 #    Runs in Docker so the host stays clean (no native shellcheck required).
 # ----------------------------------------------------------------------------
 $RULE_VERBOSE && log_step "Shell scripts (shellcheck)"
-mapfile -d '' SH_FILES < <(find . -path ./.git -prune -o -path ./.tmp -prune -o -path ./vendor -prune -o -path ./archive -prune -o -path ./node_modules -prune -o \( -name '*.sh' -o -name '*.bash' \) -print0 2>/dev/null)
+mapfile -d '' SH_FILES < <(find . -path ./.git -prune -o -path ./.tmp -prune -o -path ./.crush -prune -o -path ./vendor -prune -o -path ./archive -prune -o -path ./node_modules -prune -o \( -name '*.sh' -o -name '*.bash' \) -print0 2>/dev/null)
 if [ "${#SH_FILES[@]}" -gt 0 ]; then
     if have shellcheck; then
         if shellcheck "${SH_FILES[@]}" >/dev/null 2>&1; then