warp-core: edge reverse index for tick patch replay

[flyingrobots]

Tick patch replay currently needs to locate an existing edge by EdgeId when applying an UpsertEdge. Today this is implemented as an O(total_edges) scan across all outbound buckets.

Implement a reverse index in GraphStore (e.g., EdgeId -> from NodeId) so patch replay can migrate edges in O(bucket_edges) instead of O(total_edges).

Acceptance:

• No behavioral change for state_root / commit_id semantics.
• Clippy/tests/rustdoc gates remain green.
• Tick patch apply no longer performs a full scan for UpsertEdge.

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🔗 Similar Issues

Related Issues

• WarpTickPatchV1 delta patches + commit hash v2 #149

🔗 Related PRs

#150 - WarpTickPatchV1 delta patches + commit hash v2 [closed]

👤 Suggested Assignees

• flyingrobots

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