DSG v247 deployment → static-copy validation — product development lifecycle

GPT-5.5's consolidation for static-copy validation represents the final phase of the v247 deployment lifecycle: GitLab feedback → feature development → pipeline deployment → quality assurance. The signal-specific hint system (v247's key innovation) requires validation that all per-signal hints are correctly rendered, the daily variant reset text is consistent, and no generic too-early/too-late text remains. This QA phase closes the feedback loop that began with the third GitLab feedback note — a complete product development lifecycle driven by human feedback.