util: Add HoursDouble
https://github.com/bitcoin/bitcoin/pull/24697/commits/fa253d385f9201ea10beacecf3e0e80ff69f3138
Add ChronoFormatter to serialize
https://github.com/bitcoin/bitcoin/pull/24697/commits/fa5103a9f5f8559ab005c0b012d3d3a8057d81fb
Add type-safe AdjustedTime() getter to timedata
Also, fix includes.
https://github.com/bitcoin/bitcoin/pull/24697/commits/fa2ae373f33fa76dc4e435e7cb4778055aa6afd5
refactor: Use type-safe std::chrono for addrman time
This concludes backport of core#24697
https://github.com/bitcoin/bitcoin/pull/24697/commits/fa64dd6673767992eb4e0e775fb0afdfd298610d
Depends on D15094