feat(solo): instantly mine on POST /transactions #1849

Job	Run time
License Check / license-check	34s
Run Unit Tests / test_coverage	1m 47s
Lint / golangci-lint	1m 34s
Go Module Check / ensure go mod is tidy	10s
Run Unit Tests / unit_tests (1.24.x, macos-latest)	1m 20s
Run Unit Tests / unit_tests (1.24.x, ubuntu-latest)	1m 19s
E2E Tests / Build Docker image	1m 41s
Run Unit Tests / unit_tests (1.22.x, ubuntu-latest)	1m 49s
Run Unit Tests / unit_tests (1.24.x, windows-latest)	1m 45s
Run Unit Tests / unit_tests (1.21.x, ubuntu-latest)	1m 48s
Run Unit Tests / unit_tests (1.23.x, ubuntu-latest)	1m 48s
Rosetta Tests / Run Solo e2e Tests	1m 48s
Test Docker Publish / Build and Push Docker Image	1m 38s
E2E Tests / run-hayabusa-tests / run-tests (tests/validations)	1m 33s
E2E Tests / run-hayabusa-tests / run-tests (tests/energy)	1m 32s
E2E Tests / run-hayabusa-tests / run-tests (tests/delegations)	1m 32s
E2E Tests / run-hayabusa-tests / run-tests (tests/slots)	1m 32s
E2E Tests / run-hayabusa-tests / run-tests (tests/stargate)	1m 33s
E2E Tests / Run Tests	1s
	26m 44s

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