Rvert "fix: pin base v4 subgraph ellipfra index directly (for oncall issue) (#1386)"

[jsy1218]

Routing-api beta deploy still failed. From CloudFormation, seems like missing secret still:

7d4420d9-8ed9-4691-bec5-b70cb38f701c | 2026-03-17 10:44:21 UTC-0700 | PoolCacheLambdaChainId143ProtocolV27FF046A9 | UPDATE_FAILEDLikely root cause | - | Could not find a value associated with JSONKey in SecretString
-- | -- | -- | -- | -- | --


[7d4420d9-8ed9-4691-bec5-b70cb38f701c](https://us-east-2.console.aws.amazon.com/cloudformation/home?region=us-east-2#/stacks/operations/info?stackId=arn%3Aaws%3Acloudformation%3Aus-east-2%3A145079444317%3Astack%2Fbeta-us-east-2-RoutingAPI-RoutingCachingStackNestedStackRoutingCachingStackNestedStack-1IB2BOVT8S8YN%2F9d5e38f0-e32f-11ee-b765-0a4e3ec9d317&operationId=7d4420d9-8ed9-4691-bec5-b70cb38f701c)
2026-03-17 10:44:21 UTC-0700
[PoolCacheLambdaChainId143ProtocolV27FF046A9 ](https://us-east-2.console.aws.amazon.com/lambda/home?region=us-east-2#functions/beta-us-east-2-RoutingAPI-PoolCacheLambdaChainId14-jB9i7Fg0WrQN)
UPDATE_FAILED
Likely root cause
-
Could not find a value associated with JSONKey in SecretString

[graphite-app]

Graphite Automations

"Request reviewers once CI passes on routing-api repo" took an action on this PR • (03/17/26)

4 reviewers were added and 1 assignee was added to this PR based on Siyu Jiang (See-You John)'s automation.