Tezlink Bootstrapped RPC

What

Expose the bootstrapped monitor RPC in Tezlink and implement it using L2 block information.

How

• Imported and registered the bootstrapped monitor service from Tezos_shell_services.
• Implemented the bootstrapped function in the Tezlink backend using the latest block number.
• Converted Ethereum block timestamp and hash to Tezos-compatible formats.
• Added a Tezt test test_tezlink_bootstrapped validating that the returned block hash and timestamp match the most recent L2 block.
• Updated the describe endpoint output to include the new RPC.

Manually testing the MR

Run the test suite and verify that test_tezlink_bootstrapped passes:

make octez-evm-node && dune exec etherlink/tezt/tests/main.exe -- /threshold_encryption /dal latest multichain_enabled tezlink bootstrapped rpc