chore(ai): centralize guardrail scripts under .ai; add resolve_repo_root; add shims for .junie/.nolik; fix gitea contexts in release.yml

Co-authored-by: Junie <junie@jetbrains.com>

.junie/scripts/render-plantuml.sh

@@ -1,9 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-mkdir -p build/diagrams
-shopt -s nullglob
-for f in docs/architecture/c4/*.puml; do
-  docker run --rm -v "$PWD":/data plantuml/plantuml -tsvg "/data/$f" -o "/data/build/diagrams"
-  echo "Rendered build/diagrams/$(basename "${f%.puml}").svg"
-done
+# Shim: Weiterleitung auf zentrale Guardrail in .ai/
+SCRIPT_DIR="$(cd -- "$(dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd)"
+ROOT_DIR="$(git -C "$SCRIPT_DIR" rev-parse --show-toplevel 2>/dev/null || echo "$SCRIPT_DIR")"
+exec "$ROOT_DIR/.ai/scripts/render-plantuml.sh" "$@"