Add verified Protofire oracle support for Somnia mainnet

[mitchell82-stack]

Summary

Adds the missing Protofire oracle listing for Somnia Mainnet and enriches the existing Somnia Testnet row with metadata directly supported by official documentation.

Somnia documents Protofire-powered Chainlink-compatible price feeds for both networks, including BTC/USD, ETH/USD, and USDC/USD.

Type of change

• Add data rows
• Update data rows
• Remove data rows
• Schema change
• Documentation/metadata only

Scope

• Networks affected: Somnia Mainnet and Somnia Testnet
• Categories affected: oracles
• Additional notes: targeted contribution limited to one provider with Somnia-specific evidence.

Links

• Somnia documentation: https://docs.somnia.network/developer/building-dapps/oracles/protofire-price-feeds
• Protofire oracle integration: https://protofire.io/services/oracle-integration/

Validation checklist

• I followed the Style Guide and Column Definitions.
• I opened and verified every new link included in this contribution.
• I confirmed Protofire support for Somnia Mainnet and Testnet using official documentation.
• This is a targeted and source-verified contribution, not a blind bulk submission.

Optional

• Rewards address: 0xE08428534AF02053a4994da58b0A96bB8Adf6449
• Twitter (X) post link: not included