This is a direct copy of the BridgeDeposit.sol contract apart from the
name change, some code moves to make the linter happy, and promoting
various public methods to external to satisfy slither.

fix: handle null response in `eth_getBlockRange`

feat: verify contracts on sourcify during deploy

fix(sdk): have sdk properly wait for transactions

fix(sdk): correctly handle no batch case

Fixes the SDK so that it correctly handles the case where no batches
have been submitted to the StateCommitmentChain yet. Only happens in
development or immediately after a new chain is started.

feat(mr): log when txs are sent

Has the Message Relayer log transaction hashes when transactions are
sent.

fix: update PR labeler to include SDK

l2geth: Increase genesis file fetch timeout

The RPC endpoint `eth_getBlockRange` is a custom endpoint
that was added to `l2geth` to speed up pulling in data
from the sequencer to run a replica of the sequencer.
A `null` response is not handled properly, this commit
adds the retries and errors after too many retries.
It linearly backs off its timing with each retry

Updates the PR labeler to correctly label the SDK. I noticed that the
SDK was not being correctly labeled and realized that I had to add it to
this file.

maintenance: deleted watch-utils and added the utilities in env.ts

fix: update recommended memory for ops setup

fix: edge case in go/txmgr not waiting for numConfs

feat: add teleportr Postgres backend

feat: update message-relayer to use the SDK

feat(core-utils): remove Watcher and injectL2Context

An issue was recently reported (#2191) that showed that 4gb was not
sufficient to run the docker setup. This commit updates the recommended
amount of memory to 8gb.

Replaces usage of injectL2Context with asL2Provider within the batch
submitter and the replica healthcheck service.

Removed duplicated utilities in data-transport-layer

maintenance: minor README updates

Removes all message relaying utilities found inside the message-relayer
package. All of these utilities are now present in the SDK. Also
re-implements the message-relayer service with the utilities found in
the SDK.