enhancement(sematext_metrics sink): Adhere to instrumentation spec

[neuronull]

Closes: #14169

Epic: #13995

• Added EventsDropped emission
• Added compliance test helper

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Soak Test Results

Baseline: 2c58589
Comparison: 7464397
Total Vector CPUs: 4

Explanation

A soak test is an integrated performance test for vector in a repeatable rig, with varying configuration for vector. What follows is a statistical summary of a brief vector run for each configuration across SHAs given above. The goal of these tests are to determine, quickly, if vector performance is changed and to what degree by a pull request. Where appropriate units are scaled per-core.

The table below, if present, lists those experiments that have experienced a statistically significant change in their throughput performance between baseline and comparision SHAs, with 90.0% confidence OR have been detected as newly erratic. Negative values mean that baseline is faster, positive comparison. Results that do not exhibit more than a ±8.87% change in mean throughput are discarded. An experiment is erratic if its coefficient of variation is greater than 0.3. The abbreviated table will be omitted if no interesting changes are observed.

No interesting changes in throughput with confidence ≥ 90.00% and absolute Δ mean >= ±8.87%:

Fine details of change detection per experiment.

experiment	Δ mean	Δ mean %	confidence	baseline mean	baseline stdev	baseline stderr	baseline outlier %	baseline CoV	comparison mean	comparison stdev	comparison stderr	comparison outlier %	comparison CoV	erratic	declared erratic
datadog_agent_remap_datadog_logs	1.22MiB	2.05	100.00%	59.18MiB	3.28MiB	68.81KiB	0	0.0554147	60.4MiB	5.01MiB	104.23KiB	0	0.0828647	False	False
syslog_loki	287.91KiB	1.95	100.00%	14.45MiB	225.74KiB	4.63KiB	0	0.0152576	14.73MiB	751.14KiB	15.27KiB	0	0.0497992	False	False
http_text_to_http_json	711.36KiB	1.83	100.00%	37.95MiB	817.0KiB	16.68KiB	0	0.0210211	38.64MiB	811.91KiB	16.57KiB	0	0.0205147	False	False
socket_to_socket_blackhole	269.7KiB	1.11	100.00%	23.69MiB	176.87KiB	3.61KiB	0	0.00728942	23.95MiB	257.71KiB	5.26KiB	0	0.0105041	False	False
http_pipelines_blackhole_acks	11.23KiB	0.89	100.00%	1.24MiB	120.45KiB	2.45KiB	0	0.0951066	1.25MiB	54.32KiB	1.11KiB	0	0.0425096	False	False
splunk_hec_route_s3	83.56KiB	0.43	80.31%	18.91MiB	2.23MiB	46.49KiB	0	0.118067	18.99MiB	2.15MiB	45.06KiB	0	0.113301	False	False
http_to_http_acks	42.25KiB	0.24	13.82%	17.53MiB	8.16MiB	170.52KiB	0	0.465219	17.57MiB	8.27MiB	172.72KiB	0	0.470677	True	True
splunk_hec_to_splunk_hec_logs_noack	12.12KiB	0.05	72.28%	23.83MiB	426.8KiB	8.72KiB	0	0.0174882	23.84MiB	341.03KiB	6.96KiB	0	0.0139668	False	False
splunk_hec_to_splunk_hec_logs_acks	12.86KiB	0.05	39.93%	23.75MiB	883.22KiB	17.97KiB	0	0.0363029	23.77MiB	822.95KiB	16.75KiB	0	0.0338075	False	False
enterprise_http_to_http	-1.77KiB	-0.01	19.43%	23.85MiB	246.67KiB	5.04KiB	0	0.0100992	23.85MiB	251.48KiB	5.15KiB	0	0.010297	False	False
splunk_hec_indexer_ack_blackhole	-13.02KiB	-0.05	37.20%	23.75MiB	905.52KiB	18.42KiB	0	0.0372226	23.74MiB	961.79KiB	19.56KiB	0	0.0395569	False	False
file_to_blackhole	-48.67KiB	-0.05	35.24%	95.34MiB	3.47MiB	72.02KiB	0	0.0364349	95.29MiB	3.77MiB	78.43KiB	0	0.0395709	False	False
http_to_http_json	-38.3KiB	-0.16	99.70%	23.85MiB	331.2KiB	6.76KiB	0	0.0135602	23.81MiB	536.91KiB	10.96KiB	0	0.0220171	False	False
syslog_regex_logs2metric_ddmetrics	-22.95KiB	-0.18	86.72%	12.48MiB	515.36KiB	10.5KiB	0	0.0403074	12.46MiB	543.6KiB	11.08KiB	0	0.0425929	False	False
datadog_agent_remap_datadog_logs_acks	-128.12KiB	-0.2	73.27%	61.83MiB	3.53MiB	73.68KiB	0	0.0570755	61.7MiB	4.27MiB	88.91KiB	0	0.0691943	False	False
fluent_elasticsearch	-190.66KiB	-0.23	100.00%	79.47MiB	54.42KiB	1.1KiB	0	0.000668559	79.29MiB	1.91MiB	39.29KiB	0	0.0240702	False	False
syslog_log2metric_humio_metrics	-33.84KiB	-0.26	99.30%	12.82MiB	298.79KiB	6.1KiB	0	0.0227555	12.79MiB	538.1KiB	10.95KiB	0	0.0410876	False	False
http_pipelines_blackhole	-4.56KiB	-0.26	83.18%	1.68MiB	71.95KiB	1.47KiB	0	0.0417518	1.68MiB	145.44KiB	2.96KiB	0	0.0846244	False	False
syslog_splunk_hec_logs	-47.1KiB	-0.28	98.94%	16.31MiB	699.91KiB	14.25KiB	0	0.0418869	16.27MiB	572.38KiB	11.68KiB	0	0.0343518	False	False
datadog_agent_remap_blackhole_acks	-194.22KiB	-0.3	94.75%	62.27MiB	4.33MiB	90.06KiB	0	0.0694527	62.08MiB	2.09MiB	43.78KiB	0	0.0336647	False	False
http_to_http_noack	-105.28KiB	-0.43	100.00%	23.84MiB	408.93KiB	8.36KiB	0	0.0167497	23.73MiB	1.15MiB	24.01KiB	0	0.0485243	False	False
syslog_humio_logs	-93.2KiB	-0.57	100.00%	16.09MiB	541.84KiB	11.06KiB	0	0.0328733	16.0MiB	549.38KiB	11.25KiB	0	0.0335199	False	False
http_pipelines_no_grok_blackhole	-79.03KiB	-0.72	99.93%	10.74MiB	193.35KiB	3.95KiB	0	0.0175783	10.66MiB	1.1MiB	22.94KiB	0	0.103348	False	False
syslog_log2metric_splunk_hec_metrics	-162.92KiB	-0.91	100.00%	17.4MiB	703.13KiB	14.32KiB	0	0.0394465	17.24MiB	726.64KiB	14.8KiB	0	0.0411418	False	False
datadog_agent_remap_blackhole	-916.61KiB	-1.47	100.00%	60.79MiB	4.05MiB	84.33KiB	0	0.0665814	59.89MiB	4.04MiB	84.27KiB	0	0.0674252	False	False