fix: address review feedback on bootstrap recovery (#644)

- Fix positions() ABI selector: uint256 -> uint8 (Stage enum)
- Replace fixed sleeps with polling loops checking on-chain timestamps
- Add trailing period to 'amplitude not reached.' error hint
- Remove 'was never set' feeDestination scenario (always set by deploy)
- Clarify warning comment scope in bootstrap-common.sh

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/recover-bootstrap.sh

@@ -139,8 +139,17 @@ if [[ "$NOW" -lt "$COOLDOWN_END" ]]; then
   if [[ "$DRY_RUN" == "true" ]]; then
     exit 0
   fi
-  info "Waiting ${REMAINING}s for cooldown ..."
-  sleep "$REMAINING"
+  info "Polling for recenter cooldown to elapse ..."
+  while true; do
+    NOW="$(cast block latest --rpc-url "$RPC_URL" --field timestamp 2>/dev/null || echo "0")"
+    if [[ "$NOW" -ge "$COOLDOWN_END" ]]; then
+      info "Recenter cooldown elapsed."
+      break
+    fi
+    REMAINING=$(( COOLDOWN_END - NOW ))
+    info "  ${REMAINING}s remaining ..."
+    sleep 5
+  done
 fi
 
 # ── Optional: extra seed buy ─────────────────────────────────────────
@@ -173,9 +182,20 @@ if [[ -n "$SEED_ETH" && -n "$KRAIKEN" ]]; then
       "($WETH,$KRAIKEN,10000,$DEPLOYER_ADDR,$SEED_WEI,0,$SQRT_LIMIT)"
     info "Seed buy complete."
 
-    # Wait for cooldown after potential recenter trigger
-    info "Waiting 65s for recenter cooldown ..."
-    sleep 65
+    # Poll until recenter cooldown elapses
+    info "Polling for recenter cooldown to elapse ..."
+    LAST_RECENTER_AFTER="$(cast call --rpc-url "$RPC_URL" "$LM_ADDRESS" "lastRecenterTime()(uint256)" 2>/dev/null || echo "0")"
+    COOLDOWN_TARGET=$(( LAST_RECENTER_AFTER + 60 ))
+    while true; do
+      NOW="$(cast block latest --rpc-url "$RPC_URL" --field timestamp 2>/dev/null || echo "0")"
+      if [[ "$NOW" -ge "$COOLDOWN_TARGET" ]]; then
+        info "Recenter cooldown elapsed."
+        break
+      fi
+      REMAINING=$(( COOLDOWN_TARGET - NOW ))
+      info "  ${REMAINING}s remaining ..."
+      sleep 5
+    done
   fi
 fi
 
@@ -191,7 +211,7 @@ if ! cast send --rpc-url "$RPC_URL" --private-key "$PRIVATE_KEY" \
   "$LM_ADDRESS" "recenter()" 2>&1; then
   error "recenter() reverted. Check the revert reason above."
   error "Common causes:"
-  error "  - 'amplitude not reached' -> need larger seed buy (use --seed-eth with --kraiken)"
+  error "  - 'amplitude not reached.' -> need larger seed buy (use --seed-eth with --kraiken)"
   error "  - 'price deviated from oracle' -> wait for TWAP history"
   error "  - 'recenter cooldown' -> wait 60s and retry"
   exit 1