CC2 ↔ Spoolman bridge with NFC tag generator

- Reads /opt/usr/canvas_record_info.json over SSH (pinned host key,
  restricted key), decodes Spoolman spool ids from the tag weight
- Mirrors spools into CC2 Control's spool library and assigns slots,
  keeps its own slot mapping, sets Spoolman locations
- Books the drop of CC2 Control's measured remaining weight to Spoolman
  after each print, idempotent across restarts and interrupted bookings
- Dry-run by default; web UI for settings, SSH key, status and log
- Tag generator for NFC Tools command chains (NTAG213/215/216)
- Tests, mock environment, Dockerfile, Gitea Actions CI

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014GcEk5tkfFSYD6NTF66NkC

requirements.txt

@@ -0,0 +1,6 @@
+fastapi==0.162.0
+uvicorn==0.54.0
+jinja2==3.1.6
+httpx==0.28.1
+paramiko==5.1.0
+segno==1.6.6