chore: add RPM/DEB packaging artifacts — 5.10

3 packages: python3-meshbay-common (dep), meshbay-hub, meshbay-node.
RPM: spec files with pre/post scriptlets (useradd, systemd macros).
DEB: DEBIAN/control + postinst for hub, control for node + common.
Systemd: hub.service (system, security hardening) + node.service
(user template @%i, EnvironmentFile for MESHBAY_UNLOCK_KEY).
packaging/README.md: build + install instructions.

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

1 files changed, 29 insertions, 0 deletions

diff --git a/packaging/deb/meshbay-hub/DEBIAN/postinst b/packaging/deb/meshbay-hub/DEBIAN/postinst
new file mode 100644
index 0000000..48921f2
--- /dev/null
+++ b/packaging/deb/meshbay-hub/DEBIAN/postinst
@@ -0,0 +1,29 @@
+#!/bin/sh
+set -e
+
+case "$1" in
+    configure)
+        # Create service account
+        if ! getent group meshbay >/dev/null 2>&1; then
+            addgroup --system meshbay
+        fi
+        if ! getent passwd meshbay >/dev/null 2>&1; then
+            adduser --system --ingroup meshbay --home /var/lib/meshbay \
+                    --no-create-home --disabled-password \
+                    --gecos "MeshBay service account" meshbay
+        fi
+
+        # Create data directory
+        install -d -o meshbay -g meshbay -m 750 /var/lib/meshbay/hub
+        install -d -o meshbay -g meshbay -m 750 /var/log/meshbay
+
+        # Enable and start service
+        if [ -d /run/systemd/system ]; then
+            systemctl daemon-reload || true
+            systemctl enable meshbay-hub.service || true
+            systemctl start meshbay-hub.service || true
+        fi
+        ;;
+esac
+
+#DEBHELPER#