Local Source Spurious Re Inits

Local sources no longer re-init when uncopied files change

For units with a local source, Terragrunt decides whether the cached copy is stale by hashing the source directory. That hash previously covered every file in the directory, including hidden files and exclude_from_copy matches that are never copied into the cache. Creating or touching such a file (an editor swap file, a scratch note) changed the hash, forcing a needless re-copy and auto-init on the next run.

The hash now covers only the files a copy would deliver, honoring the default hidden-file rule along with include_in_copy and exclude_from_copy. Files that never reach the cache no longer trigger re-initialization.