Update to BSL license

[dqii]

No description provided.

[github-actions]

Benchmarks

metric	old	new	pct change
recall (after create)	0.740	0.740	-
recall (after insert)	0.746	0.762	+2.14%
select bulk tps	485.043	478.486	-1.35%
select bulk latency (ms)	15.715	15.728	+0.08%
select bulk latency (stddev ms)	2.945	3.282	+11.44%
create latency (ms)	1219.584	1212.814	-0.56%
insert bulk tps	11.099	11.398	+2.70%
insert bulk latency (ms)	90.092	87.726	-2.63%
insert bulk latency (stddev ms)	1.482	2.127	+43.52%
disk usage (bytes)	6348800.000	6348800.000	-

[codecov]

Codecov Report

Merging #207 (844734a) into main (3474f82) will increase coverage by 0.00%.
Report is 7 commits behind head on main.
The diff coverage is 85.71%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #207   +/-   ##
=======================================
  Coverage   83.05%   83.06%           
=======================================
  Files          18       18           
  Lines        1216     1234   +18     
  Branches      261      264    +3     
=======================================
+ Hits         1010     1025   +15     
- Misses         81       83    +2     
- Partials      125      126    +1     

Files	Coverage Δ
src/hnsw/external_index.c	91.12% <100.00%> (+0.03%)	⬆️
src/hnsw/insert.c	82.53% <100.00%> (+0.28%)	⬆️
src/hnsw/scan.c	81.37% <100.00%> (+0.37%)	⬆️
src/hnsw/utils.h	40.00% <ø> (ø)
src/hnsw/utils.c	88.00% <90.90%> (+2.28%)	⬆️
src/hnsw/build.c	80.32% <60.00%> (-0.79%)	⬇️