databases/couchdb3: update to 3.4.2, resolve PR282217

• include QuickJS engine
• support xxHash for data integrity checksums
• improved mango keys-only indexes
• https://blog.couchdb.org/2024/10/22/3-4-2/
• https://docs.couchdb.org/en/stable/whatsnew/3.4.html

• ensure snappy NIF is compiled without optimisations to avoid corrupted documents under newer clang versions, used in in 14.1-RELEASE (see PR282217 for details)

Sponsored by: SkunkWerks, GmbH

PR: 282217