fix(cells) Add rollout option and support for apigateway deployments

[markstory]

Add a new rollout option and logic to use the api_gateway deployments in all cells. I've defaulted the US to 1.0 as that region has already had a rollout done for api_gateway deployments.

Refs INC-2198

[linear-code]

INC-2198

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

RPC pooling option accidentally deleted

High Severity

Replacing apigateway.proxy.use_gateway_address removed the register call for hybridcloud.rpc.use_pooling_rate, but _get_connection in hybridcloud/rpc/service.py still calls in_random_rollout for that key. options.get then raises UnknownOption on cross-silo RPC traffic.

 

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[sentry]

Bug: The removed option hybridcloud.rpc.use_pooling_rate is still in use, causing in_random_rollout to raise an unhandled UnknownOption error on every RPC call.
_{Severity: CRITICAL}

Suggested Fix

Re-add the registration for the hybridcloud.rpc.use_pooling_rate option in src/sentry/hybridcloud/options.py. If this option is no longer needed, remove the corresponding call to in_random_rollout("hybridcloud.rpc.use_pooling_rate") from src/sentry/hybridcloud/rpc/service.py.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location: src/sentry/hybridcloud/options.py#L202-L214

Potential issue: The option `hybridcloud.rpc.use_pooling_rate` was removed from the
options registry in `src/sentry/hybridcloud/options.py`, but it is still referenced in
`src/sentry/hybridcloud/rpc/service.py` through a call to `in_random_rollout`. This
function internally calls `options.get()` without a `silent` parameter, which raises an
`UnknownOption` exception for unregistered options. Because this exception is not
handled in the call stack, every remote RPC call will crash, causing a major failure in
inter-silo communication.

Also affects:

• src/sentry/hybridcloud/rpc/service.py:527

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