M6 — cross-compile aarch64-musl + addon.zip + install docs

scripts/build-addon-zip.sh runs the whole pipeline from a host with ssh
lucy:
- one-shot messense/rust-musl-cross:aarch64-musl container builds the
  sidecar static (6.2MB stripped). Doesn't mutate crafting-table.
- fetches yt-dlp_linux_aarch64 from the upstream release page so Tier 2
  + Tier 3 work on the Pi (LibreELEC ships no Python YouTube tools)
- packages everything into plugin.video.torttube.zip with the Kodi
  install-from-zip layout
- drops the zip at /mnt/user/downloads/torttube/ on Lucy SMB

Cargo.toml swaps rustypipe to default-features=false +
rustls-tls-webpki-roots so the cross-compile is openssl-free.

addon.xml drops the unused script.module.requests requirement — main.py
only uses Python stdlib + Kodi's own modules.

docs/install.md walks the Kodi UI flow + a smoke curl that fires
Player.Open via JSON-RPC. Pi-side smoke is pending Cobb's install on
192.168.0.158.

scripts/build-addon-zip.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+# Build addon.zip for torttube — runs from a host that can ssh lucy.
+#
+# Cross-compiles the sidecar via messense/rust-musl-cross:aarch64-musl
+# (one-shot container, no crafting-table mutation), bundles yt-dlp's
+# aarch64 release binary, packages with the Kodi addon dir layout, and
+# drops the zip at /mnt/user/downloads/torttube/ on Lucy.
+#
+# Usage: bash scripts/build-addon-zip.sh
+#
+# Expected: ssh alias "lucy" works (per Sulkta SSH config), and the
+# torttube source is at /mnt/cache/appdata/crafting-table/workspace/torttube/
+# on Lucy (rsync first if you're iterating locally).
+set -euo pipefail
+
+VERSION="${VERSION:-0.0.1}"
+SRC=/mnt/cache/appdata/crafting-table/workspace/torttube
+CARGO_HOME_CACHE=/mnt/cache/appdata/crafting-table/workspace/.cargo-aarch64
+TARGET_DIR=/mnt/cache/appdata/crafting-table/workspace/.aarch64-target
+STAGE=/tmp/torttube-stage
+DEST_DIR=/mnt/user/downloads/torttube
+
+echo ">>> Cross-compile sidecar for aarch64-musl"
+ssh lucy "docker run --rm \
+  -v $SRC/sidecar:/src \
+  -v $CARGO_HOME_CACHE:/cargo-home \
+  -v $TARGET_DIR:/target \
+  -e PATH=/root/.cargo/bin:/usr/local/musl/bin:/usr/local/bin:/usr/bin:/bin \
+  -e CARGO_HOME=/cargo-home \
+  -e CARGO_TARGET_DIR=/target \
+  -e CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER=aarch64-unknown-linux-musl-gcc \
+  -e CC_aarch64_unknown_linux_musl=aarch64-unknown-linux-musl-gcc \
+  -w /src \
+  messense/rust-musl-cross:aarch64-musl \
+  cargo build --release"
+
+echo ">>> Stage addon tree"
+ssh lucy "rm -rf $STAGE && mkdir -p $STAGE/plugin.video.torttube/bin"
+ssh lucy "rsync -a $SRC/addon/plugin.video.torttube/ $STAGE/plugin.video.torttube/ --exclude bin"
+ssh lucy "cp $TARGET_DIR/aarch64-unknown-linux-musl/release/torttube-sidecar $STAGE/plugin.video.torttube/bin/"
+
+echo ">>> Fetch yt-dlp aarch64 release binary"
+ssh lucy "curl -sSL -o $STAGE/plugin.video.torttube/bin/yt-dlp \
+  https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp_linux_aarch64"
+ssh lucy "chmod +x $STAGE/plugin.video.torttube/bin/*"
+
+echo ">>> Build addon.zip"
+ssh lucy "cd $STAGE && rm -f plugin.video.torttube.zip && \
+  zip -r plugin.video.torttube.zip plugin.video.torttube/ -x '*.DS_Store' > /dev/null"
+
+echo ">>> Drop at $DEST_DIR/plugin.video.torttube-$VERSION.zip"
+ssh lucy "mkdir -p $DEST_DIR && cp $STAGE/plugin.video.torttube.zip \
+  $DEST_DIR/plugin.video.torttube-$VERSION.zip"
+
+ssh lucy "ls -la $DEST_DIR/"
+echo ">>> done — install via Kodi: Settings > Add-ons > Install from zip"
+echo "    SMB path: smb://lucy/downloads/torttube/plugin.video.torttube-$VERSION.zip"