Plan wave 11 (M-authexpiry): refresh token each sync, recover lost rows

wave-chain.sh: commit subject now comes from tasks/<task>.subject instead
of being hard-coded for waves 9/10; drop a stale session trailer.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tasks/wave-chain.sh

@@ -139,7 +139,7 @@ EOF
   COST="$(jq -r '"$" + ((.total_cost_usd//0)|tostring) + ", " + ((.num_turns//0)|tostring) + " turns"' "$L/$T.json" 2>/dev/null)"
   git add -A
   git commit -q -F - <<EOF
-Wave $W ($T): $( [ "$T" = K-manual ] && echo "add a book by hand, no ISBN required" || echo "search own library + Open Library + Google Books, deduplicated" )
+Wave $W ($T): $( if [ -f "tasks/$T.subject" ]; then head -1 "tasks/$T.subject"; else echo "see tasks/$T.txt"; fi )
 
 Committed by tasks/wave-chain.sh after its mechanical gate passed
 (assembleDebug, testDebugUnitTest = $BASE tests, verifyPaparazziDebug, no build
@@ -147,7 +147,6 @@ files touched, no "always 'false'"). ORCHESTRATOR REVIEW STILL PENDING.
 Prompt: tasks/$T.txt. Worker: $COST.
 
 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
-Claude-Session: https://claude.ai/code/session_01RWoivrRUEmJLFFwbsrGkqQ
 EOF
   SHA="$(git rev-parse --short HEAD)"
   if timeout 120 git push -q origin HEAD 2>>"$CLOG"; then PUSHED="pushed"; else PUSHED="PUSH FAILED (see wave-chain.log)"; fi