fix: dedup filter collision between different senders + build scripts default --pull

- Dedup key now includes source peer fingerprint hash, preventing
  packets from different senders with same room+seq from being dropped
  as duplicates (was silently killing all multi-hop audio)
- Build scripts default to --pull (use --no-pull to skip)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/build-and-notify.sh

@@ -17,12 +17,13 @@ LOCAL_OUTPUT="target/android-apk"
 SSH_OPTS="-o ConnectTimeout=15 -o ServerAliveInterval=15 -o ServerAliveCountMax=4 -o LogLevel=ERROR"
 
 REBUILD_RUST=0
-DO_PULL=0
+DO_PULL=1
 DO_INSTALL=0
 for arg in "$@"; do
     case "$arg" in
         --rust) REBUILD_RUST=1 ;;
         --pull) DO_PULL=1 ;;
+        --no-pull) DO_PULL=0 ;;
         --install) DO_INSTALL=1 ;;
     esac
 done

scripts/build-linux-docker.sh

@@ -17,12 +17,13 @@ NTFY_TOPIC="https://ntfy.sh/wzp"
 LOCAL_OUTPUT="target/linux-x86_64"
 SSH_OPTS="-o ConnectTimeout=15 -o ServerAliveInterval=15 -o ServerAliveCountMax=4 -o LogLevel=ERROR"
 
-DO_PULL=0
+DO_PULL=1
 DO_CLEAN=0
 DO_INSTALL=0
 for arg in "$@"; do
     case "$arg" in
         --pull) DO_PULL=1 ;;
+        --no-pull) DO_PULL=0 ;;
         --clean) DO_CLEAN=1 ;;
         --install) DO_INSTALL=1 ;;
     esac