Bump chainlink-protos/svr to v1.3.0 and emit per-OFA gas limit

[mostlyconsistent]

What

• Bumps github.com/smartcontractkit/chainlink-protos/svr from v1.2.0 → v1.3.0, which adds the optional gas_limit field (9) to the TxMessage proto.
• Plumbs the per-OFA "accountability" (OFA-tiered) gas limit into the emitted SVR TxMessage.GasLimit.

Why

The OFA gas tier reserves the last two digits of the gas limit per OFA backend so an on-chain transaction can be attributed to a specific OFA (e.g. Titan / MEV-Share) for auction and performance comparison. Until now that tiered limit was computed at broadcast time but never made it into the beholder TxMessage, so downstream consumers couldn't attribute transactions.

Builds on top of #462

[github-actions]

⚠️ API Diff Results - github.com/smartcontractkit/chainlink-evm

⚠️ Breaking Changes (2)

pkg/txm (1)

• EmitTxMessage — Type changed:

func(
  context.Context, 
  string, 
  github.com/ethereum/go-ethereum/common.Hash, 
  github.com/ethereum/go-ethereum/common.Address, 
  *github.com/smartcontractkit/chainlink-evm/pkg/txm/types.Transaction, 
  + uint64
)
error

pkg/txm.Metrics (1)

• EmitTxMessage — Type changed:

func(
  context.Context, 
  github.com/ethereum/go-ethereum/common.Hash, 
  github.com/ethereum/go-ethereum/common.Address, 
  *github.com/smartcontractkit/chainlink-evm/pkg/txm/types.Transaction, 
  + uint64
)
error

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