feat(core): add random relayer selection endpoint

[shiyasmohd]

Changes made in this PR

• Add /relayers/:chain_id/send_random endpoint.
• Extract shared send_transaction logic.
• Filter out paused and internal-only relayers from random selection

Closes #22

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[joshstevens19]

thanks for the feature added a list of things we need to do to get this mergeable shout if you have any questions

[shiyasmohd]

thanks for the review @joshstevens19 . Working on the requested changes.

[joshstevens19]

thanks for the review @joshstevens19 . Working on the requested changes.

no worries thanks or the PR - also FYI clippy issues need fixing as well - https://github.com/joshstevens19/rrelayer/actions/runs/18270302259/job/52023412499?pr=28

[shiyasmohd]

@joshstevens19 PR is ready for review now.

[joshstevens19]

hey gave another review just a few last changes required thanks

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Project	Deployment	Preview	Comments	Updated (UTC)
rrelayer	Ready	Preview	Comment	Oct 12, 2025 1:33pm

[shiyasmohd]

@joshstevens19 Thanks for the review. I've pushed the changes.

[joshstevens19]

looks great thanks for the PR

[joshstevens19]

Just need to run some tests on this tomorrow then we can merge thanks again

[shiyasmohd]

Sure!

[joshstevens19]

Did some fixes to this but I can probably get this live tomorrow now @shiyasmohd