Fix triejournaldirectory wiring

[jschnelder]

Description

This PR fixes a config wiring gap for cache.triejournaldirectory.

CacheConfig.TrieJournalDirectory was exposed in internal/cli/server/config.go (with TOML/HCL tags), but the value was not wired through buildEth() and was effectively ignored because eth/backend.go always used a hardcoded stack.ResolvePath("triedb").

What was done:

1. Wired c.Cache.TrieJournalDirectory in buildEth() into ethconfig.Config.
2. Added TrieJournalDirectory to ethconfig.Config.
3. Updated eth/ethconfig/gen_config.go so TOML marshal/unmarshal includes this field.
4. Updated eth/backend.go to use config.TrieJournalDirectory when provided, and keep default fallback to DATADIR/triedb when empty.

Result:

• User-provided cache.triejournaldirectory now works.
• Existing behavior remains unchanged when config is not set (backward-compatible).

Changes

• Bugfix (non-breaking change that solves an issue)
• Hotfix (change that solves an urgent issue, and requires immediate attention)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)
• Changes only for a subset of nodes

Nodes audience

This change is backward-compatible for all nodes.
Operational impact is mainly for node operators who explicitly set cache.triejournaldirectory (their configured directory is now respected).

Checklist

• I have added at least 2 reviewer or the whole pos-v1 team
• I have added sufficient documentation in code
• I will be resolving comments - if any - by pushing each fix in a separate commit and linking the commit hash in the comment reply
• Created a task in Jira and informed the team for implementation in Erigon client (if applicable)
• Includes RPC methods changes, and the Notion documentation has been updated

Cross repository changes

• This PR requires changes to heimdall
  • In case link the PR here:
• This PR requires changes to matic-cli
  • In case link the PR here:

Testing

• I have added unit tests
• I have added tests to CI
• I have tested this code manually on local environment
• I have tested this code manually on remote devnet using express-cli
• I have tested this code manually on amoy
• I have created new e2e tests into express-cli

Manual tests

1. Set cache.triejournaldirectory in config TOML to a custom relative path and start the node.
2. Verify trie journal files are written under <DATADIR>/<custom-path>.
3. Remove the field (or set empty), restart node, and verify fallback path remains <DATADIR>/triedb.

[claude]

Claude Code Review

This pull request is from a fork — automated review is disabled. A repository maintainer can comment @claude review to run a one-time review.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
15.8% Duplication on New Code

See analysis details on SonarQube Cloud