functions deploy returning 500 ("internal error") for one specific function – project cmrhpmvjmbhzlpfhqzgw, slug generate-lesson

## Bug report - [x] I confirm this is a bug with Supabase, not with my own application. - [x] I confirm I have searched the Docs, GitHub Discussions, and Discord. ## Describe the bug `supabase functions deploy` returns `HTTP 500 {"message":"Function deploy failed due to an internal error"}` deterministically (7/7 attempts over 3 days) for one specific function in our project, even though: - The same slug happily accepts a minimal stub and even a verbatim copy of a different function's source. - All imports the real file uses deploy fine when combined with a trivial handler body. - The bundle is 4.50 MB (well under the 20 MB limit), all asset uploads report success, and the failure arrives only at the final server-side provisioning step. - `function_logs` / `function_edge_logs` contain no matching runtime error — the failure never reaches user code. - Supabase status page showed "all systems operational" throughout. The opaque "internal error" message gives us nothing to act on, and no other function in the same project is affected. ## To Reproduce Project ref: `cmrhpmvjmbhzlpfhqzgw` (eu-central-1) Function slug: `generate-lesson` 1. `npx supabase@2.76.15 functions deploy generate-lesson --no-verify-jwt --project-ref cmrhpmvjmbhzlpfhqzgw` 2. All `Uploading asset (...)` lines complete successfully. 3. Final line: `unexpected deploy status 500: {"message":"Function deploy failed due to an internal error"}`. 4. Repeats identically on every retry, with and without `--debug` (debug adds no extra server-side detail). Contrast matrix (same CLI, same project, minutes apart): | Content deployed to `generate-lesson` slug | Result | | ---------------------------------------------------------------------------------------------------- | ------------------ | | Our production 740-line `index.ts` | 500 (7/7 attempts) | | Minimal stub (`Deno.serve((…