feat(1474): expose ledger-emitted events from the node

[m2ux]

Summary

Expose ledger-emitted events from the node so downstream consumers (notably the indexer) no longer have to re-execute transactions to reconstruct them.

🐛 Issue 📐 Engineering

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Motivation

The node currently discards every event emitted by the ledger when processing a transaction (see ledger/src/versions/common/api/ledger.rs). To recover this data, the indexer re-applies every transaction locally — duplicating compute the node has already done and creating a divergence risk between the node and any consumer that needs to know what actually happened in a block. Exposing these events from the node removes the duplication and gives every downstream service a single, trustworthy source of truth.

The work package will also assess the network-traffic and architectural implications of publishing all events, as flagged on the originating issue, before settling on a publication mechanism.

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Changes

Implementation (coming next):

• Surface ledger-emitted events through the node's existing event/state APIs (mechanism TBD during plan-prepare)
• Update the call-site in ledger/src/versions/common/api/ledger.rs so events are propagated rather than discarded
• Add coverage that asserts events are observable end-to-end from the node

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📌 Submission Checklist

• Changes are backward-compatible (or flagged if breaking)
• Pull request description explains why the change is needed
• Self-reviewed the diff
• I have included a change file, or skipped for this reason: [reason]
• If the changes introduce a new feature, I have bumped the node minor version
• Update documentation (if relevant)
• No new todos introduced

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🔱 Fork Strategy

• Node Runtime Update
• Node Client Update
• Other
• N/A

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🗹 TODO before merging

• Ready for review