fix: version display, FileBrowser auto-login, nostr relay, UID mappings

Version per build:
- Health endpoint returns "1.2.0-alpha-{git_hash}" using GIT_HASH env
- CI passes git hash to cargo build

FileBrowser auto-login:
- filebrowser-client.ts: include CSRF token + credentials:include
- First-boot: generate random password, store at secrets/filebrowser/
- Set FileBrowser admin password to match after container creation

Nostr relay:
- Use docker.io/scsibug/nostr-rs-relay:0.9.0 (not in our registry)

UID mappings:
- Added electrumx (UID 1000), mysql-mempool, archy-btcpay-db, nextcloud-db

522 tests pass, Rust compiles clean.

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

image-recipe/build-auto-installer-iso.sh

@@ -1285,6 +1285,15 @@ loginctl enable-linger archipelago 2>/dev/null || true
 runuser -u archipelago -- bash -c 'export XDG_RUNTIME_DIR=/run/user/1000 && systemctl --user enable --now podman.socket' 2>>"$LOG" || true
 
 # Create FileBrowser container as archipelago user (rootless podman)
+# Generate random FileBrowser password and store for auto-login
+FB_PASS_DIR="/var/lib/archipelago/secrets/filebrowser"
+mkdir -p "$FB_PASS_DIR"
+if [ ! -f "$FB_PASS_DIR/password" ]; then
+    head -c 24 /dev/urandom | base64 | tr -d '/+=' | head -c 24 > "$FB_PASS_DIR/password"
+    chmod 600 "$FB_PASS_DIR/password"
+    chown 1000:1000 "$FB_PASS_DIR/password"
+fi
+
 if ! runuser -u archipelago -- bash -c 'export XDG_RUNTIME_DIR=/run/user/1000 && podman ps -a --format "{{.Names}}"' 2>/dev/null | grep -q filebrowser; then
     echo "[$(date)] Creating FileBrowser container ($FILEBROWSER_IMAGE)..." >> "$LOG"
     runuser -u archipelago -- bash -c "export XDG_RUNTIME_DIR=/run/user/1000 && podman run -d --name filebrowser --restart unless-stopped \
@@ -1305,6 +1314,12 @@ if ! runuser -u archipelago -- bash -c 'export XDG_RUNTIME_DIR=/run/user/1000 &&
         --database=/data/database.db --root=/srv --address=0.0.0.0 --port=80" 2>>"$LOG" && \
         echo "[$(date)] FileBrowser created successfully" >> "$LOG" || \
         echo "[$(date)] WARNING: FileBrowser creation failed" >> "$LOG"
+    # Set FileBrowser password to match the stored random password
+    sleep 5
+    FB_PASS=$(cat "$FB_PASS_DIR/password" 2>/dev/null || echo "admin")
+    runuser -u archipelago -- bash -c "export XDG_RUNTIME_DIR=/run/user/1000 && podman exec filebrowser filebrowser users update admin --password '$FB_PASS' --database /data/database.db" 2>>"$LOG" && \
+        echo "[$(date)] FileBrowser admin password set" >> "$LOG" || \
+        echo "[$(date)] WARNING: Could not set FileBrowser password" >> "$LOG"
 fi
 echo "[$(date)] Minimal first-boot complete" >> "$LOG"
 FBUNBUNDLED