Add operator handoff for cleanup and platform summary

docs/MASTER_INDEX.md

@@ -18,6 +18,7 @@
 | **Git submodule hygiene + explorer remotes** | [00-meta/SUBMODULE_HYGIENE.md](00-meta/SUBMODULE_HYGIENE.md) — detached HEAD, push order, Gitea/GitHub, `submodules-clean.sh` |
 | **MEV intel + public GUI (`mev.defi-oracle.io`)** | Framing: [../MEV_Bot/docs/framing/README.md](../MEV_Bot/docs/framing/README.md); deploy: [04-configuration/MEV_CONTROL_DEFI_ORACLE_IO_DEPLOYMENT.md](04-configuration/MEV_CONTROL_DEFI_ORACLE_IO_DEPLOYMENT.md); LAN bring-up: [04-configuration/MEV_CONTROL_LAN_BRINGUP_CHECKLIST.md](04-configuration/MEV_CONTROL_LAN_BRINGUP_CHECKLIST.md) (dedicated backend CT on `r630-04`); completion list: [04-configuration/MEV_CONTROL_COMPLETION_PUNCHLIST.md](04-configuration/MEV_CONTROL_COMPLETION_PUNCHLIST.md); execution values/readiness: [04-configuration/MEV_EXECUTION_VALUE_SOURCES_AND_READINESS.md](04-configuration/MEV_EXECUTION_VALUE_SOURCES_AND_READINESS.md); specs: [../MEV_Bot/specs/README.md](../MEV_Bot/specs/README.md) |
 | **What to do next** | [00-meta/NEXT_STEPS_INDEX.md](00-meta/NEXT_STEPS_INDEX.md) — ordered actions, by audience, execution plan |
+| **Recent cleanup / handoff summary** | [00-meta/OPERATOR_HANDOFF_2026-04-13_CLEANUP_AND_PLATFORM_SUMMARY.md](00-meta/OPERATOR_HANDOFF_2026-04-13_CLEANUP_AND_PLATFORM_SUMMARY.md) |
 | **Live verification evidence (dated)** | [00-meta/LIVE_VERIFICATION_LOG_2026-03-30.md](00-meta/LIVE_VERIFICATION_LOG_2026-03-30.md) |
 | **Your personal checklist** | [00-meta/NEXT_STEPS_FOR_YOU.md](00-meta/NEXT_STEPS_FOR_YOU.md) |
 | **Operator runbook (LAN/creds)** | [00-meta/NEXT_STEPS_OPERATOR.md](00-meta/NEXT_STEPS_OPERATOR.md) |