Release 3.4.0.0.3: bug fixes and improvements

[Brice Dobry]

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Hash: SHA256


Greetings,

Stacks core developers have released Stacks Core version 3.4.0.0.3, available here: https://github.com/stacks-network/stacks-core/releases/tag/3.4.0.0.3.

This release contains several bugfixes, including fixes for possible node crashes, and improvements to the stacks-node and stacks-signer binaries, ensuring more consistent block production. It is recommended you upgrade for increased node stability and performance.

This release is compatible with chainstate directories from 3.4.x.x.x.

The version of stacks-signer compatible with this release is 3.4.0.0.3.0, available at: https://github.com/stacks-network/stacks-core/releases/tag/signer-3.4.0.0.3.0.

This release is recommended for all Stacks node operators and includes the following changes:

### Added
* Allow non-blocking event dispatching. This is off by default, but can be enabled in the node configuration.
* Introduced caching for contracts loaded/parsed within the context of a single Clarity transaction, reducing resource usage for many calls to the same contract.
* Add defensive memory allocation checks for miners and signers. This adds two new config options: `max_assembly_mem_bytes` and `block_proposal_max_tx_mem_bytes`
* Bump MARF index DB schema to v3: add squash metadata tables (`marf_squash_info`, `marf_squashed_blocks`) and the storage foundation for the MARF squashing pipeline.
* Add support for u64 children pointer offsets in the MARF trie, using a mixed u32/u64 encoding with a 0x20 bit flag for backward compatibility

### Changed
* Exposed `MockSignature::signature` field and `MockProposal::signer_signature_hash()` method as `pub` in `libsigner::v0::messages`, enabling external consumers (observer/indexer tooling) to recover signer pubkeys f$

### Fixed
* Fixed potential overflow in signer threshold arithmetic by widening intermediate computations to `u64` ([#7189](https://github.com/stacks-network/stacks-core/pull/7189))
* Mark a transaction as problematic when it hits the execution time limit.
* Fixed the miner reporting of the reason it stopped mining to prometheus metrics.

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Docker images have been published to GitHub Container Registry:

### Stacks Core:

* Debian (glibc): https://github.com/stacks-network/stacks-core/pkgs/container/stacks-core/885354798?tag=3.4.0.0.3
```sh
docker pull ghcr.io/stacks-network/stacks-core:3.4.0.0.3@sha256:4e4e861c0c47d33e7deae4793f446977004ec226108b9c4dbda949c789f491f3
```
* Alpine (musl): https://github.com/stacks-network/stacks-core/pkgs/container/stacks-core/885354135?tag=3.4.0.0.3-alpine
```sh
docker pull ghcr.io/stacks-network/stacks-core:3.4.0.0.3-alpine@sha256:da2ca02e0376d804a4f1ddeaf9ba7fafdd3166e7317a8583e4f4078b15dfe9a7
```

### Stacks Signer

* Debian (glibc): https://github.com/stacks-network/stacks-signer/pkgs/container/stacks-signer/885352180?tag=3.4.0.0.3.0
```sh
docker pull ghcr.io/stacks-network/stacks-signer:3.4.0.0.3.0@sha256:483055ccc4555935e945d50a89242310832f8c4d977a05452b33b0921a914c3f
```
* Alpine (musl): https://github.com/stacks-network/stacks-signer/pkgs/container/stacks-signer/885352452?tag=3.4.0.0.3.0-alpine
```sh
docker pull ghcr.io/stacks-network/stacks-signer:3.4.0.0.3.0-alpine@sha256:9d21f1d1c568e252685e7a29f5d47a6613ea54c810cf161cafb15d262b48a0ed
```

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Stacks Core:
Git commit hash: 32b5f7c9fdb29df7900984afaccfe5511069f016
SHA512SUMS:
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Stacks Signer:
Git commit hash: 32b5f7c9fdb29df7900984afaccfe5511069f016
SHA512SUMS:
f90782b9e0266de04e15def68dafa8d8282ebec055c7eb54e1424f48a4e92c5711dc46553f86a0692a953a0934f371cb5d8e64bc6691a947f342933de63d16d1  linux-glibc-arm64.zip
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Best Regards,
Brice Dobry
Staff Engineer, Stacks Labs
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