fix: 统一 resolver 两处 .resolve() 的 except 子句

review Minor：line 79 守卫为 (OSError, RuntimeError)，而同一操作在
_contained 中守卫为 (ValueError, OSError, RuntimeError)。两处守卫漂移
正是 defect claude-code-best#4/claude-code-best#5 的形态——补齐 ValueError 使二者一致，永久杜绝该模式。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: pwx603

mcp/ccarch/ccarch/resolver.py

@@ -76,7 +76,7 @@ def resolve(repo_root: Path, cited: str) -> Resolved:
         # (Python doesn't scope names to blocks), so binding it here is
         # both necessary and sufficient.
         repo_resolved = repo_root.resolve()
-    except (OSError, RuntimeError):
+    except (ValueError, OSError, RuntimeError):
         # Path.resolve() raises RuntimeError("Symlink loop from ...") for a
         # circular symlink instead of OSError/ValueError like every other
         # unresolvable-path case. It looks redundant to catch it here, but