A pure move, no behaviour change. #222's public intake endpoint needs the same path from a multipart request to files on the uploads volume that the admin routes use, and the alternative to sharing it is a near-copy that has to reproduce every safety property exactly: the type allowlist, the magic-byte check after the write, names from a CSPRNG rather than from `originalname`, the re-encode that strips EXIF, and the cleanup of whatever a refused request left behind. A copy that drifted on any of those is the gap #95, #103, #180 and #226 exist to close.
`stripUploadedImages` moved with the rest, which the plan originally did not say — it was written before #226 added it. Leaving it behind would have given the intake route an upload path that skips EXIF stripping, and no test would have failed to say so, because the intake tests are written against a route that does not exist yet. The refreshed plan added a check with a definite answer, and it now holds: routes/admin.ts no longer imports imageProcessing at all.
Every comment came across verbatim. They record why the code is shaped as it is and are the most valuable part of what moved.
Lint caught something the compiler did not: MAX_IMAGES_PER_REQUEST was left imported into admin.ts, where its only use — `upload.array('images', MAX_IMAGES_PER_REQUEST)` — had moved away with the middleware. It stays exported from imageUpload for the intake route's caps, but admin.ts does not need it.
Verified as a refactor rather than as a change: the four suites that exercise this path hardest were run before the move and after it, 44 tests both times, same suites, same count. Full backend: 263 integration, 302 unit, lint back to its 6 pre-existing warnings, build clean.
Ref #222