- Introduces global synonym and curation sets as top‑level resources, breaking existing nested collection APIs and changing analytics rule format.
- Adds major search enhancements: MMR diversification, IPv6 binding, expanded JOIN and Union search capabilities, facet sampling, and new operators (e.g., ! negation, group max candidates).
- Includes extensive bug fixes across query parsing, analytics ID generation, highlighting, embedding handling, and deadlock prevention.