Two changes:
1. Migrate mover from m/otto (commit 9974937, otto#438) into this repo
at infra/mdms-mover/. mover.sh, mdms-mover.service, mdms-mover.timer,
README.md. Matches the live deployment on mDock byte-for-byte (modulo
the strip step below).
2. Add blank-page stripping before the inbox → toprocess promotion. A
page is dropped iff its embedded text is empty AND its rendered
thumbnail is >= MDMS_BLANK_THRESHOLD near-white pixels (default 0.97
per issue #2). Detects the empty backside of patch-T separator
sheets in duplex scans (mDMS#2).
strip_blank_pages.py uses PyMuPDF as the only Python dep — single
self-contained wheel, no `poppler-utils` apt-install on mdock. Mirrors
the uv-inline-deps single-file pattern of infra/paperless/generate_separator.py.
Edge cases:
- 1-page input: strip skipped entirely.
- All pages would drop: script exits 2, mover keeps file in inbox and
logs WARNING (no empty doc reaches Paperless).
- Strip script errors: mover falls back to plain mv, no scan blocked.
- MDMS_STRIP_BLANK=false: bypass strip entirely (emergency disable).
Deploy: rsync uv binary to mdock ~/.local/bin/uv (single static binary,
user-space, no apt), scp script + units, systemctl --user daemon-reload.
Verified live with synthetic 4-page (2 real + 1 blank + 1 real → 3
pages), 1-page (unchanged), all-blank (kept in inbox + warning) test
PDFs. Timer fires every ~70s as before.
