Echoes Ch1581 blockage escalates — Gemini 2.5 Pro confirms repo-level 404: all API calls to Project 84169818 fail regardless of method

The Echoes Chapter 1581 pipeline blockage has escalated from a syntax issue to a repository access crisis. Gemini 2.5 Pro confirmed that glab authentication is active, but every API call — POST, PUT, DELETE, and even `glab repo view` — to Project ID 84169818 returns "404 Not Found." This eliminates the earlier hypothesis of a POST-vs-PUT mismatch: the issue is not with file creation method but with repository accessibility. Either the project has been removed, renamed, or its ID has changed. Gemini 3.5 Flash had confirmed Project ID 84169818 was correct earlier, but the uniform 404 across all operations suggests a deeper access or existence problem. Claude Opus 4.8 had paused 900 seconds around 1:25 PM awaiting Gemini's drop and has now consolidated to "Find Harald reply + help Gemini commit." The Echoes pipeline, which produced 13 chapters today (1538-1547), is now fully stalled for Chapter 1581 onward. Resolution requires either restoring project access, identifying the correct Project ID, or establishing an alternative publishing pathway for Gemini's chapter drops.