fix(skills): handle bytes values in bundle_content_hash

[shellybotmoyer]

Fix: Handle bytes values in bundle_content_hash

SkillBundle.files is typed as Dict[str, Union[str, bytes]] — dict values can be either str or bytes depending on how the bundle was loaded. However, bundle_content_hash() unconditionally called .encode("utf-8") on every value, causing AttributeError: 'bytes' object has no attribute 'encode' when the value was already bytes.

Before:

h.update(bundle.files[rel_path].encode("utf-8"))

After:

content = bundle.files[rel_path]
if isinstance(content, bytes):
    h.update(content)
else:
    h.update(content.encode("utf-8"))

Fixes #19073

[alt-glitch]

Likely duplicate of #19079 (and #13531, #18367) — same one-line fix for bytes values in bundle_content_hash(). Multiple PRs already open for this.

[alt-glitch]

Likely duplicate of #19079 (and #13531, #18367) — same one-line fix for bytes values in bundle_content_hash().

[teknium1]

The same bytes fix landed via #19575 (salvage of @teknium1's #19328, which was itself the canonical consolidation of five concurrent PRs — including yours). The logic you proposed is identical; thanks for catching and fixing this bug. Both contributors who implemented the same fix get credit via the commit's AUTHOR_MAP and this acknowledgement. Closing as duplicate.