chore: Remove async-graphql integration

[nicolasburtey]

Summary

• remove the optional graphql features from cala-ledger and cala-ledger-core-types
• drop async-graphql / base64 from Cala manifests and lockfile
• remove async-graphql enum derives and CursorType impls from Cala types

Verification

• SQLX_OFFLINE=true cargo check -p cala-ledger-core-types
• SQLX_OFFLINE=true cargo check -p cala-ledger
• SQLX_OFFLINE=true cargo check -p cala-ledger --all-features
• cargo tree -p cala-ledger -e features -i async-graphql reports no matching package

Companion Lana change moves the GraphQL API representation to Lana-owned wrapper enums.

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Note

Medium Risk
Removes the optional GraphQL feature surface (async-graphql derives and cursor encoding) and related dependencies, which is potentially breaking for downstream consumers that enabled graphql features, but does not change core ledger logic.

Overview
Removes async-graphql integration from cala-ledger and cala-ledger-core-types by deleting the graphql feature flags and all related enum derives and CursorType implementations.

Updates workspace and crate manifests plus Cargo.lock to drop async-graphql, base64, and their transitive dependencies, leaving cursor structs as plain serde-serializable types.

^{Reviewed by Cursor Bugbot for commit 15e3349. Bugbot is set up for automated code reviews on this repo. Configure here.}

[github-actions]

📊 Performance Report

Commit: 15e3349
Updated: 2026-05-01 17:10:49 UTC

Cala Performance Benchmark Results (non-representative)

Criterion Benchmark Results (single-threaded)

Benchmark	Time per Run	Throughput	% vs Baseline
post_simple_transaction	7.105ms	140 tx/s	0 (baseline)
post_and_recalculate_ec_account_set	17.096ms	58 tx/s	-140.0%
post_and_batch_recalculate_ec_account_set	12.802ms	78 tx/s	-80.0%
post_multi_layer_transaction	7.567ms	132 tx/s	-6.0%
post_simple_transaction_with_effective_balances	12.236ms	81 tx/s	-72.0%
post_simple_transaction_with_skipped_velocity	6.326ms	158 tx/s	+10.0%
post_simple_transaction_with_velocity	8.268ms	120 tx/s	-16.0%
post_simple_transaction_with_hit_velocity	4.081ms	245 tx/s	+42.0%
post_simple_transaction_with_one_account_set	6.669ms	149 tx/s	+6.0%
post_simple_transaction_with_five_account_sets	7.992ms	125 tx/s	-12.0%
post_simple_transaction_with_ec_account_set	6.275ms	159 tx/s	+11.0%

Load Testing Results (parallel-execution)

Scenario	tx/s
1 parallel	86.62
2 parallel	128.35
5 parallel	159.07
10 parallel	159.60
20 parallel	153.57
2 contention	121.40
5 contention	134.82
2 acct_sets	112.28
5 acct_sets	121.64

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Note: Performance results may vary based on system resources and database state.

Last updated by commit 15e3349