feat(deploy): add upload success logging for debugging

[athola]

Background

Identified during PR #27 review as out-of-scope enhancement.

Original Review Comment:

G2: Consider adding upload success logging (low priority)

Location: .github/workflows/deploy.yml (upload section)

Scope

Add logging for successful file uploads during deployment to improve debugging and visibility into the deploy process.

Suggested Implementation

After each successful upload (HTTP 200/201), log:

• File path uploaded
• Target bucket path
• Response status

Example:

if [[ "$HTTP_STATUS" =~ ^2 ]]; then
  echo "✓ Uploaded: $file → $BUCKET_PATH"
fi

Acceptance Criteria

• Log successful uploads with file path
• Include in both deploy.yml and deploy-dry-run.yml
• Keep output clean (consider verbosity flag)

References

• PR fix(deploy): use REST API for uploads to control MIME types #27: fix(deploy): use REST API for uploads to control MIME types #27
• Related to deployment workflow improvements

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Created from PR #27 review triage