chore: extend the default block_proposal_timeout to 4 hours

[obycode]

Until #5729 is implemented, then there is no point in rejecting a block from a miner, no matter how late it is, since no other miner will ever try to extend into its tenure.

Fixes #5753

[aldur]

@obycode we are not sure whether the failures we are seeing are due to flakiness (probably) or a bug introduced by this PR (unlikely). In all cases, we are updating the branch, which will re-run the tests.

[obycode]

@obycode we are not sure whether the failures we are seeing are due to flakiness (probably) or a bug introduced by this PR (unlikely). In all cases, we are updating the branch, which will re-run the tests.

Thanks, I'll take a look. I agree, it seems unlikely that any test was inadvertently depending on that timeout, since it was already 10 minutes, but I'll investigate.

[obycode]

Ok, I pushed a commit to fix the flakiness in tests::nakamoto_integrations::skip_mining_long_tx.

tests::signer::v0::block_validation_pending_table looks like it just needs more time in the wait_for:

INFO [1738255286.453318] [testnet/stacks-node/src/nakamoto_node/stackerdb_listener.rs:327] [stackerdb_listener_232] StackerDBListener: Signature Added to block, block_signer_sighash: 3d43a9631e2465e2db0534dca2e617c021b9e96e4f52f0f3443067009b5c5a7f, signer_pubkey: 0223b39433cbdec8f307a4cbfd91204e8fa2cb32b57b977a726014412c50aea016, signer_slot_id: 1, signature: 011007d0c220268a75c5541eebbf7504e0b7e9182b97d9519410ee6e10652b719e0869b274543a72207a183fc5c9c73468b7008467e34f06bb8d1d80e9332bee91, signer_weight: 6, total_weight_signed: 30, tenure_extend_timestamp: 1738255360, server_version: stacks-signer 0.0.1 (:, debug build, linux [x86_64])
INFO [1738255286.453346] [testnet/stacks-node/src/nakamoto_node/signer_coordinator.rs:356] [miner.dcf9fdf3d3b3eed2e9c6b283559f09dd37e60370cde5b3cc0d147680c02a0dd8.1279939293] Received enough signatures, block accepted, block_signer_sighash: 3d43a9631e2465e2db0534dca2e617c021b9e96e4f52f0f3443067009b5c5a7f
thread 'tests::signer::v0::block_validation_pending_table' panicked at testnet/stacks-node/src/tests/signer/v0.rs:8024:6:
Timed out waiting for pending block validation to be submitted: "Timed out"
ERRO [1738255286.539887] [testnet/stacks-node/src/tests/nakamoto_integrations.rs:693] [tests::signer::v0::block_validation_pending_table] Timed out waiting for check to process

You can see the approval arrived just before the timeout, so just a little more time and it would've been fine. I'll bump that from 30s to 60s.

I need to take a closer look at tests::signer::v0::multiple_miners_empty_sortition.

[obycode]

I'm tempted to just bump all 30s timeouts to 60s.

[obycode]

tests::signer::v0::multiple_miners_empty_sortition does pass locally and the flakiness does not seem to be related to this change. I'll open an issue for it, but it does not need to hold up this PR.