add 7 RPC benches: cosmos-hub + injective + neutron + world-chain + kaia + ink + opbnb (094-100)

[Flotapponnier]

Summary

7 new per-chain RPC latency benches, all extending the existing rpc-capabilities cluster.

Cosmos batch (harness kind=cosmos, Tendermint status probe)

• cosmos-hub (094) — 4 keyless providers (publicnode, polkachu, lavenderfive, lava)
• injective (095) — 4 keyless providers (injective-official, publicnode, polkachu, lavenderfive)
• neutron (096) — 3 keyless providers (publicnode, polkachu, lavenderfive)

EVM batch (harness kind=evm, eth_getBlockByNumber probe)

• world-chain (097) — 4 keyless providers (worldchain-official/Alchemy public, drpc, tenderly, thirdweb)
• kaia (098) — 3 keyless providers (kaia-official, drpc, thirdweb)
• ink (099) — 5 keyless providers (ink-official/Gelato, ink-quicknode, drpc, tenderly, thirdweb)
• opbnb (100) — 4 keyless providers (opbnb-official, publicnode, drpc, thirdweb)

Notable audit exclusions

• Cosmos Hub: rpc.cosmos.network returned Cloudflare 525
• Neutron: rpc-kralum.neutron-1.neutron.org SSL handshake failure
• Kaia: BlockPI needs API key, Alchemy public rejects KAIA_MAINNET
• Ink: Alchemy public rejects INK_MAINNET
• opBNB: NodeReal + BlockPI need keys or 404
• World Chain: PublicNode has no worldchain subdomain yet

Files

• 7 new benchmarks/*-rpc.yml (all pass SpecSchema.safeParse)
• 7 new chain blocks in harnesses/rpc-capabilities/cmd/script/config.go
• 7 new chain entries in src/lib/chains.ts
• 6 new provider entries in src/data/provider-registry.ts (injective-official, worldchain-official, kaia-official, ink-official, ink-quicknode, opbnb-official)
• 4 new logo files (cosmos-hub.svg, world-chain.png, kaia.png, ink.svg); reuses existing injective.svg + neutron.svg + bnb.png (opbnb alias)
• Cache keys bumped bench-unfiltered v38→v39, all-benchmarks v41→v42

Also included (unrelated, dead code)

• harnesses/rwa-yield-accuracy/cmd/script/oracle.go — Chainlink + Aave oracle readers I had in local WIP from an earlier RWA sprint. No caller (main.go still has BENJI/OUSG probes commented out as TODO V2), compiles clean, doesn't affect runtime. Left in to avoid stashing complexity; can strip in a follow-up if unwanted.

Test plan

• All 7 YAMLs pass SpecSchema.safeParse locally
• Harness Go build clean
• Worker rebuild on VPS ocb-par-main picks up new benches
• Harness Railway auto-deploy emits Prom metrics for 7 new chains
• /chains/{cosmos-hub,injective,neutron,world-chain,kaia,ink,opbnb} surface the new bench cards
• /benchmarks/{...} all HTTP 200 after aggregate cache warm + prod deploy