Split renovate config: repo config in renovate.json, bot config in ops/

Renovate liest die repo-eigene renovate.json als REPO-Config, nicht
als BOT-Config. Bot-spezifische Felder (platform, endpoint,
repositories, autodiscover, gitAuthor, prHourlyLimit, ...) gehoeren
nicht hinein und werden als "this repo is forbidden / disabled"
fehlinterpretiert.

Saubere Trennung:
- renovate.json (Repo-Root): nur extends, packageRules,
  ignorePaths, manager file patterns, labels, rangeStrategy
- ops/renovate/bot-config.js: Plattform, Endpoint, Username,
  gitAuthor, autodiscover=false, repositories=[Micha/homelab-infra],
  Concurrent-/Hourly-Limits

bot-config.js statt config.json, weil Renovate Module-exports als
config-file akzeptiert (offizielle Variante).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ops/renovate/run-renovate.sh

@@ -20,7 +20,7 @@ RENOVATE_IMAGE="${RENOVATE_IMAGE:-renovate/renovate:41}"
 RENOVATE_TOKEN_FILE="${RENOVATE_TOKEN_FILE:-/mnt/user/appdata/secrets/renovate_token.txt}"
 RENOVATE_LOG_DIR="${RENOVATE_LOG_DIR:-/mnt/user/services/renovate/logs}"
 RENOVATE_STATE_DIR="${RENOVATE_STATE_DIR:-/mnt/user/services/renovate/state}"
-RENOVATE_CONFIG_FILE="${RENOVATE_CONFIG_FILE:-/mnt/user/services/homelab-infra/renovate.json}"
+RENOVATE_CONFIG_FILE="${RENOVATE_CONFIG_FILE:-/mnt/user/services/homelab-infra/ops/renovate/bot-config.js}"
 # Gitea sitzt hinter Traefik unter git.kaleschke.info; der WAN-Pfad geht
 # ueber Public-IP -> FRITZBox. Vom Docker-Container aus loest der Standard-
 # Resolver den Host moeglicherweise nicht auf (siehe `extra_hosts` im Komodo-
@@ -60,9 +60,7 @@ LATEST_SYMLINK="$RENOVATE_LOG_DIR/latest.log"
   umask 077
   cat > "$ENV_FILE" <<EFEOF
 RENOVATE_TOKEN=$(cat "$RENOVATE_TOKEN_FILE")
-RENOVATE_CONFIG_FILE=/usr/src/app/config.json
-RENOVATE_PLATFORM=gitea
-RENOVATE_ENDPOINT=https://git.kaleschke.info/api/v1
+RENOVATE_CONFIG_FILE=/usr/src/app/config.js
 LOG_LEVEL=${RENOVATE_LOG_LEVEL:-info}
 EFEOF
   chmod 600 "$ENV_FILE"
@@ -72,7 +70,7 @@ EFEOF
     --add-host "git.kaleschke.info:$GITEA_HOST_LAN_IP" \
     --dns 1.1.1.1 \
     --dns 8.8.8.8 \
-    -v "$RENOVATE_CONFIG_FILE":/usr/src/app/config.json:ro \
+    -v "$RENOVATE_CONFIG_FILE":/usr/src/app/config.js:ro \
     -v "$RENOVATE_STATE_DIR":/tmp/renovate \
     --env-file "$ENV_FILE" \
     "$RENOVATE_IMAGE" 2>&1