Fix dead/incorrect vars and consolidate duplicated logic into common.sh

Codebase-wide audit pass: fixed real bugs (SSH hangs missing BatchMode,
local-outside-function no-ops, variable name collisions, a truncated
ratio calc, wrong state-dir path, DARK vs NO_INTERNET drift, and more),
then pulled logic that was duplicated across multiple scripts — arr
cleanup safety gates, docker restart ordering, container maintenance
stop/restart, watchdog state-file helpers, partnership role resolution,
cert expiry checks, remote node discovery, and TMDB discovery scoring —
into common.sh so each now has a single implementation.

Partnership/partnership_transfer.sh

@@ -128,17 +128,7 @@ fi
 
 detect_hosts
 
-OWNER_ID="${PARTNERSHIP_OWNER_HOST:-HOST1}"
-MIRROR_ID=$( [[ "$OWNER_ID" == "HOST1" ]] && echo "HOST2" || echo "HOST1" )
-OWNER="${!OWNER_ID}"
-MIRROR="${!MIRROR_ID}"
-MIRROR_SSH_KEY="$SSH_KEY"
-OWNER_SSH_KEY="$SSH_KEY"
-
-AM_OWNER=false
-AM_MIRROR=false
-[[ "$MY_ID" == "$OWNER_ID" ]] && AM_OWNER=true
-[[ "$MY_ID" == "$MIRROR_ID" ]] && AM_MIRROR=true
+partnership_resolve_roles
 
 LOCAL_STATE_FILE="${STATE_DIR}/partnership_${LOCAL_SERVER_NAME}.db"
 REMOTE_STATE_FILE="${STATE_DIR}/partnership_${REMOTE_SERVER_NAME}.db"
@@ -286,14 +276,11 @@ if [[ "$DRY_RUN" == false ]]; then
 
     # Push updated master.conf to new owner so both servers agree immediately.
     # master.conf is shared — host-specific credentials live in host*.conf.
-    _probe_cmd=$(platform_scripts_dir_probe_cmd)
-    _REMOTE_SD=$(ssh -i "$SSH_KEY" -o ConnectTimeout=5 -o StrictHostKeyChecking=no \
-        "root@${MIRROR_IP}" "$_probe_cmd" \
-        2>/dev/null | tr -d '[:space:]')
-    _REMOTE_SD="${_REMOTE_SD:-$SCRIPTS_DIR}"
+    _REMOTE_SD=$(resolve_remote_scripts_dir "$MIRROR_IP" "$SSH_KEY" "no")
     scp -i "$SSH_KEY" \
         -o ConnectTimeout="$SSH_TIMEOUT" \
         -o StrictHostKeyChecking=no \
+        -o BatchMode=yes \
         "$SCRIPTS_ROOT/Configurations/master.conf" \
         "root@${MIRROR_IP}:${_REMOTE_SD}/Configurations/master.conf" 2>/dev/null && \
         echo "master.conf pushed to $NEW_OWNER ✅" || \