feat: initial live.f12.rocks SFTP → gmic/rembg → web pipeline

Event pep stack with SFTPGo inbox, sequential worker, FastAPI gallery/remix, and Traefik-ready compose.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/rembg_cli.py

@@ -0,0 +1,31 @@
+"""Minimal `rembg` runner, invoked as its own subprocess.
+
+We deliberately don't shell out to the official `rembg` CLI: that needs
+the `rembg[cli]` extra (aiohttp, gradio, watchdog, ...) just to run a
+single background removal. Calling the `remove()` API directly from a
+tiny script keeps the image smaller while still giving pipeline.py a
+subprocess boundary to apply `nice` and a hard timeout to.
+"""
+
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+
+def main() -> int:
+    if len(sys.argv) != 3:
+        print("usage: python -m app.rembg_cli <input> <output>", file=sys.stderr)
+        return 2
+
+    from rembg import remove
+
+    input_path = Path(sys.argv[1])
+    output_path = Path(sys.argv[2])
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+    output_path.write_bytes(remove(input_path.read_bytes()))
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())