Revert --stack-size=65536; stack overflow was harmless

With larger stack, recovery code completes and triggers a crash in
Paperclip's issue-graph traversal result handling (exit code 1).
The RangeError was caught internally and the app continued fine.
Reverting lets the stack overflow remain caught-and-logged, which
is the working state.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

start.sh

@@ -214,7 +214,7 @@ trap cleanup SIGTERM SIGINT
 
 # ── Launch Paperclip ──────────────────────────────────────────────────────────
 echo "Starting Paperclip..."
-node --stack-size=65536 --import ./server/node_modules/tsx/dist/loader.mjs server/dist/index.js &
+node --import ./server/node_modules/tsx/dist/loader.mjs server/dist/index.js &
 PAPERCLIP_PID=$!
 
 # Wait for API ready (max 90s)