External indexing socket with SSL support

[github-actions[bot]]

Benchmarks

metric	old	new	pct change
recall (after create)	0.951	0.953	+0.21%
recall (after insert)	0.000	0.000	-
select tps	25374.002	25827.280	+1.79%
select bulk(100) tps	35.720	34.496	-3.43%
select latency (ms)	0.745 ± 1.560𝜎	0.726 ± 1.615𝜎	-2.55%
select bulk(100) latency (ms)	885.606 ± 99.034𝜎	884.818 ± 143.799𝜎	-0.09%
create latency (ms)	396793.805	393713.500	-0.78%
insert tps	431.859	447.078	+3.52%
insert bulk(100) tps	4.802	4.927	+2.60%
insert latency (ms)	73.505 ± 15.007𝜎	70.953 ± 15.966𝜎	-3.47%
insert bulk(100) latency (ms)	6513.105 ± 135.856𝜎	6365.889 ± 109.313𝜎	-2.26%
disk usage (bytes)	8192008192.000	8192008192.000	-

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 73.39450% with 29 lines in your changes missing coverage. Please review.	Files	Patch %	Lines
src/hnsw/external_index_socket.c	72.72%	14 Missing and 4 partials :warning:
src/hnsw/external_index_socket_ssl.c	68.57%	4 Missing and 7 partials :warning:

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