feat: score escrow with configurable hold window before auto-commitment

.github/workflows/ci.yml

@@ -41,6 +41,23 @@ jobs:
       - uses: Swatinem/rust-cache@v2
       - run: cargo test --workspace
 
+  bench:
+    name: Batch submit benchmarks
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+      - name: Run batch submit benchmarks
+        run: cargo bench -p ledgerlens-score --bench batch_submit -- --noplot
+      - name: Upload benchmark results
+        uses: actions/upload-artifact@v4
+        with:
+          name: batch-submit-bench-results
+          path: target/criterion/
+          retention-days: 30
+
   build:
     name: WASM build
     runs-on: ubuntu-latest

CHANGELOG.md

@@ -6,6 +6,18 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 
 ---
 
+## [Unreleased]
+
+### Added
+- **Parameter Change Governance**: Added `propose_parameter_change`, `execute_parameter_change`, and `veto_parameter_change` for time-locked admin parameter changes with service-signer veto during the first half of the delay window. Supports cooldown, history depth, decay rate, velocity cap, and upgrade delay parameters. See [`docs/governance.md`](docs/governance.md).
+- **Mock AMM liquidity gate**: `contracts/mock-amm` adds `provide_liquidity_gated`, `set_risk_oracle`, and confidence-aware gate configuration. See [`examples/amm_gate_example.rs`](examples/amm_gate_example.rs).
+- **Batch submit benchmarks**: Criterion suite in `contracts/ledgerlens-score/benches/batch_submit.rs` measuring throughput and Soroban budget cost at batch sizes 1, 10, 50, and 100. Results uploaded as CI artifacts on merge to `main`.
+
+### Changed
+- **Lazy score TTL extension**: `set_score` now skips `extend_ttl` when the entry's estimated remaining TTL is still at or above `SCORE_TTL_THRESHOLD`, reducing ledger instruction cost for batch resubmissions to pre-warmed entries.
+
+---
+
 ## [3.0.0] - 2026-06-22
 
 This version corresponds to on-chain `CONTRACT_VERSION = 3`. It merges all the advanced features introduced in recent pull requests (hysteresis, score embargo, score floor, batch attestation, and consensus scoring).