fix: return cancun (#160)

## Summary by Sourcery

Add support for the Cancun fork time to the Besu genesis configuration
and ensure related bootstrap tests include the new field.

New Features:
- Include a cancunTime field in the Besu genesis configuration with a
default value.
- Extend bootstrap-related test fixtures to account for the new
cancunTime configuration value.

<!-- This is an auto-generated description by cubic. -->
## Summary by cubic
Restores the cancunTime field in Besu genesis configs so Cancun fork
activation is included in generated artifacts. Updates bootstrap tests
to cover cancunTime.

- **Bug Fixes**
- Added cancunTime to BesuGenesisConfig and the default values returned
by BesuGenesisService.
- Updated bootstrap genesis prompt and selective artifacts tests to
include cancunTime in sample payloads.

<sup>Written for commit d311ba4.
Summary will update automatically on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

Author: insider89

src/cli/commands/bootstrap/bootstrap.genesis-prompts.test.ts

@@ -57,6 +57,7 @@ const createServiceStub = () => {
       berlinBlock: 0,
       londonBlock: 0,
       shanghaiTime: 0,
+      cancunTime: 0,
       zeroBaseFee: true,
     },
     nonce: "0x0",

src/cli/commands/bootstrap/bootstrap.selective-artifacts.test.ts

@@ -49,6 +49,7 @@ const createSamplePayload = (filter: ArtifactFilter): OutputPayload => ({
       berlinBlock: 0,
       muirGlacierBlock: 0,
       shanghaiTime: 0,
+      cancunTime: 0,
       zeroBaseFee: false,
       qbft: {
         blockperiodseconds: 5,

src/genesis/besu-genesis.service.ts

@@ -36,6 +36,7 @@ type BesuGenesisConfig = {
   readonly berlinBlock: number;
   readonly londonBlock: number;
   readonly shanghaiTime: number;
+  readonly cancunTime: number;
   readonly zeroBaseFee: boolean;
   readonly contractSizeLimit?: number;
   readonly evmStackSize?: number;
@@ -117,6 +118,7 @@ export class BesuGenesisService {
         berlinBlock: 0,
         londonBlock: 0,
         shanghaiTime: 0,
+        cancunTime: 0,
         zeroBaseFee: (config.gasPrice ?? 0) === 0,
         contractSizeLimit: config.contractSizeLimit,
         evmStackSize: config.evmStackSize,