v0.1.5

Bug fixes

• changelog: new_version is now included in diff output (was silently dropped due to off-by-one)
• issues: guard against None datetimes in until / since filters that could crash fetch_issues and get_issues_for_version_range
• github: raise a descriptive error on non-200 responses on page 1 (404 repo-not-found, etc.) instead of silently returning an empty list
• analyze: drop None tag_name values before calling fetch_compare to avoid malformed API URLs
• llm: guard empty choices and missing content attributes in the streaming loop
• changelog: skip structured data when the LLM returned an error payload