fix: systemd tangle-deploy missing ob-shell, add OIDC proxy, chmod fix

- Replaced stale /usr/local/bin/tangle-deploy (no (require 'ob-shell))
  with correct repo version — was writing crowdsecLapiKey: nil every 5min
- Added chmod +x to tangle-deploy.sh so git pull doesn't strip exec bit
- Added oidc-rewrite-proxy.py and oidc-proxy.service as tangle targets
- Documented Gitea OIDC discovery rewrite fix
- Added systemd unit detection to tangle-deploy restart logic
- Updated changelog

infrastructure.org

@@ -70,6 +70,7 @@ if [ ! -f "$ORG_FILE" ]; then
   echo "ERROR: $ORG_FILE not found in $REPO_DIR"
   exit 1
 fi
+chmod +x "$0"
 echo "=== Tangling $ORG_FILE ==="
 emacs --batch -Q --load /usr/share/emacs/28.2/lisp/org/org-loaddefs.el \
   --eval "(require 'org)" \
@@ -84,6 +85,10 @@ if [ -f /docker/appdata/traefik/traefik.yaml ] || \
   echo 'Traefik config changed -- restarting...'
   docker compose up -d traefik
 fi
+if [ -f /etc/systemd/system/oidc-proxy.service ]; then
+  echo 'Systemd unit changed -- reloading...'
+  systemctl daemon-reload
+fi
 if [ -f /docker/compose/docker-compose.yaml ]; then
   echo 'Docker compose changed -- restarting all services'
   docker compose up -d 2>&1 | tail -5
@@ -1238,6 +1243,101 @@ services:
       - traefik.http.services.gitea.loadbalancer.server.port=3000
 #+END_SRC
 
+*** Gitea OIDC — Discovery Rewrite Proxy
+
+Gitea's OIDC provider uses Authentik's auto-discovery URL to fetch
+endpoint metadata. The discovery document returned by Authentik contains
+internal Docker hostnames (like =http://authentik:9000/=) which the
+browser cannot resolve. Gitea's =openidConnect= provider in v1.25.5 does
+not support =CustomURLMapping= (confirmed from source
+=providers_openid.go= — =CreateGothProvider= ignores the field), so the
+redirect URLs must be rewritten externally.
+
+The fix is a small HTTP proxy at =172.28.10.1:9122= (the Docker bridge
+gateway) that intercepts the discovery request, fetches the real document
+from Authentik at =172.28.10.33:9000=, and rewrites all internal URLs to
+=https://auth.gharbeia.net=.
+
+The proxy runs as a systemd service on production-1:
+
+#+BEGIN_SRC ini :tangle /etc/systemd/system/oidc-proxy.service
+[Unit]
+Description=OIDC discovery rewrite proxy for Gitea
+After=network-online.target docker.service
+Wants=network-online.target
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/python3 /docker/compose/oidc-rewrite-proxy.py
+Restart=always
+RestartSec=5
+User=root
+
+[Install]
+WantedBy=multi-user.target
+#+END_SRC
+
+The proxy lives at =/docker/compose/oidc-rewrite-proxy.py= on production-1:
+
+#+BEGIN_SRC python :tangle /docker/compose/oidc-rewrite-proxy.py
+#!/usr/bin/env python3
+\"\"\"Minimal OIDC discovery rewrite proxy for Gitea's openidConnect provider.
+
+Listens on 0.0.0.0:9122. Rewrites internal Authentik URLs to the public
+HTTPS URL so Gitea redirects browsers to auth.gharbeia.net.
+\"\"\"
+
+import json
+import sys
+from http.server import HTTPServer, BaseHTTPRequestHandler
+from urllib.request import urlopen, Request
+
+UPSTREAM = "http://172.28.10.33:9000"
+PUBLIC = "https://auth.gharbeia.net"
+DISCOVERY_PATH = "/application/o/gitea-oidc/.well-known/openid-configuration"
+
+
+class RewriteHandler(BaseHTTPRequestHandler):
+    def do_GET(self):
+        if self.path != DISCOVERY_PATH:
+            self.send_response(404)
+            self.end_headers()
+            self.wfile.write(b"Not found")
+            return
+
+        try:
+            upstream_url = f"{UPSTREAM}{DISCOVERY_PATH}"
+            req = Request(upstream_url, headers={"Accept": "application/json"})
+            with urlopen(req, timeout=5) as resp:
+                body = resp.read().decode()
+                body = body.replace(UPSTREAM, PUBLIC)
+                self.send_response(200)
+                self.send_header("Content-Type", "application/json")
+                self.end_headers()
+                self.wfile.write(body.encode())
+        except Exception as e:
+            self.send_response(502)
+            self.end_headers()
+            self.wfile.write(f"Proxy error: {e}".encode())
+
+    def log_message(self, format, *args):
+        pass
+
+
+if __name__ == "__main__":
+    server = HTTPServer(("0.0.0.0", 9122), RewriteHandler)
+    print("OIDC rewrite proxy listening on :9122", flush=True)
+    server.serve_forever()
+#+END_SRC
+
+The systemd service is tangled from the block above. After deploying, enable
+with =systemctl enable --now oidc-proxy=.
+
+Gitea's =OpenIDConnectAutoDiscoveryURL= in the database was updated to point
+at the proxy:
+
+: http://172.28.10.1:9122/application/o/gitea-oidc/.well-known/openid-configuration
+
 ** Infrastructure Services
 
 Core data and networking services that everything depends on.
@@ -1632,6 +1732,23 @@ wp-config: =/docker/appdata/khaledfahmy-site/html/wp-config.php=
 - Created infrastructure.org as source of truth
 - Added Forward Auth to internal LAN routers
 
+** [2026-06-06 Sat] Systemd tangle-deploy fixed — ob-shell, chmod, OIDC proxy
+- Replaced stale /usr/local/bin/tangle-deploy (missing (require 'ob-shell))
+  with the correct repo version. Every 5-minute systemd timer cycle was
+  writing crowdsecLapiKey: nil because it couldn't evaluate the sh code block.
+- Added chmod +x "$0" to tangle-deploy.sh so git pull doesn't strip the
+  executable bit, keeping cron + systemd reliable.
+- Created and deployed oidc-rewrite-proxy.py: a discovery rewrite proxy that
+  intercepts Gitea's OIDC metadata request and rewrites internal
+  http://authentik:9000 URLs to https://auth.gharbeia.net.
+- Registered oidc-proxy as a systemd service on production-1 (port 9122).
+- Updated Gitea's OpenIDConnectAutoDiscoveryURL in the database to point
+  at the proxy (http://172.28.10.1:9122/...).
+- Reverted Gitea's CustomURLMapping to {} (confirmed unused by source code).
+- Fixed qBittorrent v5.2.1 persistent password — old PBKDF2 hash was not
+  recognized by the v5 upgrade. Set new password hash in config, updated
+  Sonarr and Radarr download client credentials via API.
+
 ** [2026-06-02 Tue] Gluetun port cleanup — only downloaders behind VPN
 - Removed 20+ stale port mappings from gluetun (services migrated off VPN)
 - Updated all internal router URLs: standalone services now referenced by