chore(deps): update consensys/teku docker tag to v25.12.0

[renovate]

This PR contains the following updates:

Package	Update	Change
consensys/teku (source)	minor	25.9.3 -> 25.12.0

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Release Notes

Consensys/teku (consensys/teku)

v25.12.0

Compare Source

This is a recommended release update containing bug fixes and improvements.

Downloads

• Available as 25.12.0 on Dockerhub
• Download the binary distribution:
  • tar.gz (sha256: db14d26fe159f256da94f03c7f00fb9053601b159c979f2b32e884214405c989)
  • zip (sha256: 5ca5ee937331715124debfd0a5486395e709eba390e4f5bbb98fe009e5cd9fe3)

Additions and Improvements

• Added new metrics beacon_earliest_available_slot and data_column_sidecar_processing_validated_total.
• Block proposal duties can now be scheduled in advance for fulu.
• Late block reorg enabled by default.
• Block building preparation enabled by default. The beacon node will now pre-compute head and pre-state selection in preparation for block building. (Disabled in Gnosis).
• Enabled a new version of sidecar recovery by default.

Bug Fixes

• Fixed a storage issue which sometimes caused Teku to crash during shut down.
• Fixed peer_count metric when using --metrics-publish-endpoint feature.
• Fixed earliest_available_slot calculation.

Upcoming Breaking Changes

N/A

v25.11.1

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This is an optional update containing improvements and bug fixes.

Downloads

• Available as 25.11.1 on Dockerhub
• Download the binary distribution:
  • tar.gz (sha256: 7304b82e567958087241a425b7504e36d1ae90f4681849359f0edf49b43295c3)
  • zip (sha256: 4bac32ade10e14b2b8059ef8f67b7393201617c21b4a23bdf92c0aeb953e1623)

Breaking Changes

• jdk 24 docker image build has been removed in favour of jdk 25 docker image build.

Additions and Improvements

• Added connection direction to beacon_peer_count metric.
• Added metrics for outgoing LibP2P RPC requests (rpc_requests_total, rpc_requests_sent and rpc_requests_failed).

Bug Fixes

• Fixed NPE in DasPreSampler.

Upcoming Breaking Changes

N/A

v25.11.0

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⚠️ This is a required update for mainnet for the upcoming Fulu upgrade! ⚠️

Downloads

• Available as 25.11.0 on Dockerhub
• Download the binary distribution:
  • tar.gz (sha256: b616f3c4306d18e61d00cc91099c9297e1e1650aacbcb5bf75f51d0d51c4058d)
  • zip (sha256: aebe30a05687f2e61b0e41ae000440db0d750b6c508120f05364dbb70280eb29)

Breaking Changes

N/A

Additions and Improvements

• 🚀 Added mainnet configuration for the Fulu fork 🦓 due at epoch 411392, December 3, 2025, 09:49:11pm UTC
• Implemented /eth/v1/beacon/states/{state_id}/proposer_lookahead which will be accessible after the Fulu fork.

Bug Fixes

N/A

Upcoming Breaking Changes

N/A

v25.10.0

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This is an optional update for Mainnet. It is recommended for all Testnets.

Downloads

• Available as 25.10.0 on Dockerhub
• Download the binary distribution:
  • tar.gz (sha256: b178e0952e299c3a6ffcd9a34b9f8d73c3521471f2e191e63467655b7f7cee67)
  • zip (sha256: 75af08a53164f36db6aa63e11ac5cb21d2201096ca4401821d131671544329a0)

Breaking Changes

• GOSSIP_MAX_SIZE, MAX_CHUNK_SIZE, TTFB_TIMEOUT and RESP_TIMEOUT configuration variables are no longer exported as they were removed from spec.
  Any release compliant with fulu (fusaka) will not require these to be present, but earlier releases may no longer be able to consume this configuration.

Known Issues

• LevelDB may log errors during shutdown under some circumstances.

Additions and Improvements

• Add User-Agent header to requests initiated from the Validator Client with the client identifier and version.
• Increase Default validator registration Gas Limit 60M for all networks.
• Rename Fulu metric for data_column_sidecar_by_root RPC request to network_rpc_data_column_sidecars_by_root_requested_sidecars_total.
• Add peer count per topic metric for data_column_sidecar subnet.
• Add Get Blobs (/eth/v1/beacon/blobs/{block_id}) Beacon API method.

Bug Fixes

N/A

Upcoming Breaking Changes

N/A

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