Merge branch 'archived_ralph/dgr-001-performance-contract' into merge/all-branches-into-master

# Conflicts:
#	.claude/memory/MEMORY.md
#	.scratch/distributed-gguf-runtime/PRD.md
#	.scratch/distributed-gguf-runtime/RALPH-CONTEXT.md
#	.scratch/distributed-gguf-runtime/README.md
#	.scratch/distributed-gguf-runtime/architecture.md
#	.scratch/distributed-gguf-runtime/evidence/DGR-017/README.md
#	.scratch/distributed-gguf-runtime/implementation-strategy.md
#	.scratch/distributed-gguf-runtime/issues/07-add-isolated-concurrent-local-hot-kv-state.md
#	.scratch/distributed-gguf-runtime/issues/13-harden-failure-cancellation-and-restart-semantics.md
#	.scratch/distributed-gguf-runtime/milestones.md
#	.scratch/distributed-gguf-runtime/prd.json
#	docs/issues/distributed-gguf-runtime/01-lock-the-safetensors-versus-gguf-performance-contract.md
#	docs/issues/distributed-gguf-runtime/02-adopt-the-versioned-grpc-shard-protocol.md
#	docs/issues/distributed-gguf-runtime/03-define-exact-artifact-and-runtime-recipe-identity.md
#	docs/issues/distributed-gguf-runtime/05-implement-dense-llama-range-aware-gguf-ownership.md
#	docs/issues/distributed-gguf-runtime/06-implement-architecture-defined-boundary-input-output.md

tests/test_settlement_loop.py

@@ -5,9 +5,7 @@ before the transaction is sent, unconfirmed batches resent by settlement id
 (never double-paying), banned wallets skipped, history queryable over HTTP.
 """
 
-import json
 import time
-import urllib.request
 
 import pytest
 
@@ -73,7 +71,7 @@ def test_threshold_triggers_payout_and_zeroes_pending():
     ledger.charge_request("client", MODEL, 1000, [("wallet-a", 12)])  # 0.018 pending
     treasury = _FakePayoutTreasury()
     tracker = _make_tracker(ledger, treasury, threshold=0.01)
-    port = tracker.start()
+    tracker.start()
     try:
         assert _wait_for(lambda: treasury.batches)
         assert treasury.batches[0] == [("wallet-a", pytest.approx(0.018))]