feat(romhacks): automated hand-off — route downloads to RomM + library, render notes

handoff.py classifies completed downloads (console rom vs RPG-Maker fangame vs
patch, via bsdtar archive peek incl. RAR5), copies console roms into
Emulation/roms/<platform> for RomM, moves the full folder (rom + guides) into
the library archive, and renders note.md + handoff.json per hack for the
Obsidian publish step. Wired into the cycle; single /data mount keeps moves as
fast renames. Validated on 4 real games.

stacks/romhacks/docker-compose.yml

@@ -48,11 +48,21 @@ services:
     networks: [romhacks]
     env_file:
       - stack.env
+    environment:
+      # Hand-off paths. /data is the single parent mount so incoming->library
+      # moves are instant renames (not cross-device copies); /emulation is the
+      # RomM Structure-A roms parent so console hacks land in roms/<platform>/.
+      - METADATA_DIR=/data/metadata
+      - INCOMING_DIR=/data/incoming
+      - LIBRARY_DIR=/data/library
+      - EMULATION_DIR=/emulation
+      - HANDOFF_STATE=/state/handled.json
     volumes:
       - /config/romhacks/exports:/exports
       - /config/romhacks/state:/state
       - /config/romhacks/crawljobs:/crawljobs
-      - /storage1/labdata/romhacks/metadata:/metadata
+      - /storage1/labdata/romhacks:/data
+      - /storage1/Emulation/roms:/emulation
 
   jdownloader:
     image: jlesage/jdownloader-2:latest