sync(plugins): update InfluxDB 3 plugin documentation

[github-actions]

Automated sync from the influxdata/influxdb3_plugins registry index
and plugin READMEs.

Sync results

Plugin	Status	Detail
amqp_subscriber	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/amqp-subscriber.md
basic_transformation	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/basic-transformation.md
bird_data_simulator	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/bird-data-simulator.md
chronos_forecasting	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/chronos-forecasting.md
downsampler	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/downsampler.md
earthquake_sampler	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/earthquake-sampler.md
forecast_error_evaluator	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/forecast-error-evaluator.md
gapfill	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/gapfill.md
geo_enrichment	updated	../../content/shared/influxdb3-plugins/plugins-library/official/geo-enrichment.md
import	updated	../../content/shared/influxdb3-plugins/plugins-library/official/import.md
influxdb_to_iceberg	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/influxdb-to-iceberg.md
kafka_subscriber	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/kafka-subscriber.md
mad_check	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/mad-check.md
mqtt_subscriber	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/mqtt-subscriber.md
nori_regression	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/nori-regression.md
notifier	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/notifier.md
nws_weather	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/nws-weather.md
opcua	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/opcua.md
prophet_forecasting	updated	../../content/shared/influxdb3-plugins/plugins-library/official/prophet-forecasting.md
resampler	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/resampler.md
river_anomaly_detector	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/river-anomaly-detector.md
river_auto_profiler	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/river-auto-profiler.md
river_forecaster	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/river-forecaster.md
sagemaker	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/sagemaker.md
schema_validator	updated	../../content/shared/influxdb3-plugins/plugins-library/official/schema-validator.md
signal_filter	updated	../../content/shared/influxdb3-plugins/plugins-library/official/signal-filter.md
signal_generator	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/signal-generator.md
simple_data_replicator	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/simple-data-replicator.md
state_change	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/state-change.md
stateless_adtk_detector	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/stateless-adtk-detector.md
stock_plugin	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/stock-plugin.md
synthefy_forecasting	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/synthefy-forecasting.md
system_metrics	updated	../../content/shared/influxdb3-plugins/plugins-library/official/system-metrics.md
threshold_deadman_checks	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/threshold-deadman-checks.md
valuecounter	unchanged	../../content/shared/influxdb3-plugins/plugins-library/official/valuecounter.md

Coverage

Official plugins upstream, reconciled against what docs-v2 publishes.

Axis	Documented	Missing
Data file	35 of 35	—
Shared page	35 of 35	—
Core stub	35 of 35	—
Enterprise stub	35 of 35	—

What each status means

• updated / unchanged — the generated region of the shared page.
• scaffolded — a new product stub. Review its title, menu name, and
  tags; the generator cannot derive editorial tags from the registry.
• skipped — no README the transform could read. Fix it upstream.
• removed — a shared page whose plugin left the registry index.
  Resolve by hand: a rename and a delete are indistinguishable here,
  so the sync never deletes a published page.

Ownership

Structured facts live in data/influxdb3_plugins.yml and are fully
generated. Prose between the BEGIN and END GENERATED PLUGIN CONTENT markers under
content/shared/influxdb3-plugins/plugins-library/official/ is
regenerated every run; anything outside those markers is hand-owned
and preserved. Product stubs under
content/influxdb3/{core,enterprise}/plugins/library/official/ are
created once and never rewritten.