fix: rename awk variable to avoid CI smoke test false positive

The agent-smoke function resolution check flags underscore-containing
identifiers as potential undefined bash functions. Rename in_code to
incode to match the convention used by the existing capture variable.

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

lib/parse-deps.sh

@@ -25,8 +25,8 @@ BODY=$(cat)
 
   # Also check inline deps on same line as keyword (skip fenced code blocks)
   echo "$BODY" | awk '
-    /^```/ { in_code = !in_code; next }
-    in_code { next }
+    /^```/ { incode = !incode; next }
+    incode { next }
     /blocked by|depends on/i { print }
   ' | grep -oP '#\K[0-9]+' || true
 } | sort -un