v0.5.2 — Status line and ccusage audit recipe

• Extended the Context-Length Threshold case study with a portable status line script (context size against the auto-compact window, colored as it nears it) and a ccusage before/after audit recipe, including the pitfalls hit while measuring: ccusage reprices history, a cost-per-day drop is confounded by workload and model mix, and a cap on context does nothing for sessions that are long in turns rather than large in context.