Resi cue countdowns on ProPresenter and in Companion

The Resi -> ProPresenter bridge, its installer and site kit, and the
Companion module resi-studio-cues, as running at North Attleboro.

Bridge (resi_to_propresenter.py)
- Follows a Resi decoder's playhead and keeps ProPresenter's NextCue timer
  counting down to the next cue; optional cue name as a stage message, sent
  once per cue (ProPresenter flashes it on every send) and off by default.
- Playhead estimate no longer learns a cadence from the partial first gap
  after a start, so a 30s Resi doesn't read as paused half the time.
- Backs off on 429, holds 2 min before retrying a failed startup login, and
  logs Resi's actual reason (wrong password, USER_LOCKED, rate limit).
- --setup asks for the login, decoder, ProPresenter and timer.

install_bridge.sh installs it as a login service (outside ~/Documents,
which launchd may not read); make_kit.sh builds the kit for another site.

Companion module resi-studio-cues 0.1.4 (source/, package committed)
- Same playhead fix; login and request hold-off (15s doubling to 5 min);
  a 401/403 on a fresh session is a permission, not a reason to sign in
  again; init never fails on a Resi problem, so Companion can't restart it
  into a login loop.

Tests: test_playhead.py, test_stage_message.py, test_rate_limit.py and
source/backoff_test.js run offline; test_end_to_end.py drives a real
ProPresenter and refuses to run without an explicit flag.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

make_kit.sh

@@ -0,0 +1,19 @@
+#!/bin/zsh
+# make_kit.sh — bundle everything another site needs into resi-propresenter-kit.zip.
+# Site settings (resi_pp_config.json) are left out on purpose: the installer asks.
+set -e
+HERE="${0:A:h}"
+cd "$HERE"
+MODULE=$(ls resi-studio-cues-*.tgz | sort -V | tail -1)
+
+STAGE=$(mktemp -d)
+KIT="$STAGE/resi-propresenter-kit"
+mkdir "$KIT"
+cp install_bridge.sh resi_to_propresenter.py README.md "$MODULE" "$KIT/"
+chmod +x "$KIT/install_bridge.sh"
+
+rm -f resi-propresenter-kit.zip
+(cd "$STAGE" && COPYFILE_DISABLE=1 zip -qrX "$HERE/resi-propresenter-kit.zip" resi-propresenter-kit)
+rm -rf "$STAGE"
+echo "Built resi-propresenter-kit.zip:"
+unzip -l resi-propresenter-kit.zip | sed -n '4,$p' | sed '$d' | sed '$d'