v6.1.0

What's Changed

• PPF-2088: bump pypdf lower bound version by @chinapandaman in #2089
• PPF-2090: enhance AI harnesses for more automated workflows by @chinapandaman in #2091
• PPF-2075: Reject ignored arguments and distinguish empty input from invalid input by @chinapandaman in #2092
• PPF-2076: Validate property applicability in CLI field updates by @chinapandaman in #2093
• PPF-2077: Resolve internal links to destination page references by @chinapandaman in #2094
• PPF-2078: Protect contributor edits during PDF comparison by @chinapandaman in #2095
• PPF-2079: Make release-helper failures explicit and target an exact commit by @chinapandaman in #2096

Full Changelog: v6.0.2...v6.1.0