fix: repository entropy audit was measuring build noise, not repo bloat

audit_repository_entropy_v2.py (the "과유불급" file-count gate in the
release DAG) was failing: 4,523 files against a 2,200 budget. Traced
it down before touching anything - the audit's _EXCLUDE_DIRS list
predates several directories this repo's own .gitignore already
excludes (Temp/, dist/, outputs/, publish_artifact/, **/bin/,
**/obj/, test-results/), so every local dotnet build/test run
inflates the count with disposable, zero-git-impact build artifacts.
Verified via `git ls-files` that none of the ~2,400 files in those
paths were tracked, versus runtime/, archive_db/, backups/, and
artifacts/ (246 files, all tracked, all genuine audit-trail/history
data) which must NOT be touched.

Cleaned the untracked build/scratch artifacts from disk and added the
missing directories to _EXCLUDE_DIRS so the metric can't be
re-inflated by normal local development again. Gate now passes at
1,934 files with real headroom, without deleting a single tracked
file. Verified full .NET build still succeeds after removing all
bin/obj folders (clean rebuild, 0 errors/warnings).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tools/audit_repository_entropy_v1.py

@@ -14,7 +14,15 @@ import yaml
 ROOT = Path(__file__).resolve().parents[1]
 
 
-_EXCLUDE_DIRS = {".git", "node_modules", "__pycache__", ".tox", ".venv", "venv"}
+_EXCLUDE_DIRS = {
+    ".git", "node_modules", "__pycache__", ".tox", ".venv", "venv",
+    # .gitignore 상 빌드/임시 산출물 디렉터리 — 2026-07-30: 이 목록이 .gitignore와
+    # 어긋나 있어서 로컬 dotnet build/test 몇 번만 해도 entropy 지표가 실제 저장소
+    # 크기와 무관하게 4,523까지 부풀었다 (실측: bin/obj/Temp/publish_artifact만
+    # 정리해도 4,523 -> 2,127). .gitignore에 새 산출물 경로가 추가되면 여기도 같이 갱신할 것.
+    "bin", "obj", "Temp", "dist", "outputs", "publish_artifact",
+    "publish-output", "test-results", ".pytest_cache",
+}
 
 
 def _iter_files(root: Path) -> list[Path]: