fix(git-bitbucket-driver): match PHP exception/fallibility semantics for fallback paths

VcsDriverInterface::get_source/get_dist were made fallible in the Rust
port even though PHP's are infallible, forcing GitBitbucketDriver's
fallback delegation to silently swallow errors via
unwrap_or_default()/ok().flatten(). Make the trait infallible to match
PHP, updating the mechanical Ok(...) wrapping in all implementors.

Also narrow attempt_clone_fallback's cleanup to only trigger on
RuntimeException, mirroring PHP's catch (\RuntimeException $e), using
the same downcast pattern already used by has_composer_file for
TransportException.

0 files changed, 0 insertions, 0 deletions