Consolidate all paths to plugin flash dir, fix watchdog 7.3 triggers

- Move SCRIPTS_DIR/DATA_DIR/STATE_DIR from appdata to /boot/config/plugins/varaverk
- All state files now in STATE_DIR (no more /tmp or /boot/config root writes)
- Bootstrap: Gitea-first clone with GitHub fallback, no array dependency
- varaverk.cfg seeded with Gitea connection settings
- .gitignore: add State_Files/, varaverk.cfg, varaverk-*.txz
- Partnership/transcode/fallback scripts use STATE_DIR variables
- PHP config.php: DATA_DIR/STATE_DIR constants, VV_SETUP_STATE_FILE dynamic
- deploy.sh PROD_ROOT updated to plugin flash dir

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Partnership/onboard_cancel.sh

@@ -54,7 +54,7 @@ OWNER_ID="${PARTNERSHIP_OWNER_HOST:-HOST1}"
 MIRROR_ID=$( [[ "$OWNER_ID" == "HOST1" ]] && echo "HOST2" || echo "HOST1" )
 MIRROR="${!MIRROR_ID}"
 SSH_KEY_PUB="${SSH_KEY}.pub"
-STATE_FILE="/boot/config/varaverk_setup.db"
+STATE_FILE="${VARAVERK_SETUP_FILE:-${STATE_DIR:-/boot/config}/varaverk_setup.db}"
 AUTH_KEYS="/root/.ssh/authorized_keys"
 MIRROR_SHORT="${MIRROR%%.*}"