Add MEV post-deploy config patch helper

docs/04-configuration/MEV_EXECUTION_VALUE_SOURCES_AND_READINESS.md

@@ -126,6 +126,28 @@ The helper also records the deployed executor's on-chain:
 
 so you have an auditable deployment record instead of stdout-only notes.
 
+## Cutover-ready config patching
+
+Once the contracts are actually broadcast, use the artifact to patch the MEV config deterministically instead of editing TOML by hand:
+
+```bash
+bash scripts/deployment/apply-mev-execution-config-from-artifact.sh \
+  --artifact reports/status/mev_execution_deploy_YYYYMMDD_HHMMSS.json \
+  --config MEV_Bot/mev-platform/config.toml \
+  --uniswap-v2-router 0x... \
+  --sushiswap-router 0x...
+```
+
+That runs in dry-run mode by default and prints a unified diff. Add `--apply` when the diff is correct.
+
+This patch step updates:
+
+- `chains.<id>.execution.executor_contract`
+- `chains.<id>.execution.flash_loan_provider`
+- `chains.<id>.factories[].router` for `uniswap_v2`
+- `chains.<id>.factories[].router` for `sushiswap`
+- optional `relay_url` if `--relay-url` is supplied
+
 ## Commit policy
 
 Safe to commit: