fix: feat: generic journal aspect — post-session reflection + lessons-learned context injection (#97)

lib/formula-session.sh

@@ -339,6 +339,7 @@ profile_load_lessons() {
     local lessons_content
     lessons_content=$(head -c 2048 "$lessons_file" 2>/dev/null) || lessons_content=""
     if [ -n "$lessons_content" ]; then
+      # shellcheck disable=SC2034  # exported to caller for prompt injection
       LESSONS_CONTEXT="## Lessons learned (from .profile/knowledge/lessons-learned.md)
 ${lessons_content}"
       log "profile: loaded lessons-learned.md (${#lessons_content} bytes)"