Harden deployment env flows and surface external blockers

docs/MASTER_INDEX.md

@@ -26,6 +26,7 @@
 | **Source to CEX execution plan** | [03-deployment/SOURCE_TO_CEX_EXECUTION_PLAN.md](03-deployment/SOURCE_TO_CEX_EXECUTION_PLAN.md) — operator bridge, normalization, and exchange-handoff plan |
 | **Source to CEX production readiness** | [03-deployment/SOURCE_TO_CEX_PRODUCTION_READINESS.md](03-deployment/SOURCE_TO_CEX_PRODUCTION_READINESS.md) — repo-native readiness gate for immediate production |
 | **Immediate live production task list: source to CEX** | [03-deployment/IMMEDIATE_LIVE_PRODUCTION_TASK_LIST_SOURCE_TO_CEX.md](03-deployment/IMMEDIATE_LIVE_PRODUCTION_TASK_LIST_SOURCE_TO_CEX.md) — task list with remaining live blockers called out |
+| **External dependency blockers** | [03-deployment/EXTERNAL_DEPENDENCY_BLOCKERS.md](03-deployment/EXTERNAL_DEPENDENCY_BLOCKERS.md) — explicit list of items that cannot be closed by repo-only changes, with readiness checks and env knobs |
 | **Crypto.com OTC before vs after matrix** | [03-deployment/CRYPTO_COM_OTC_BEFORE_AFTER_OPERATOR_MATRIX.md](03-deployment/CRYPTO_COM_OTC_BEFORE_AFTER_OPERATOR_MATRIX.md) — strict operator comparison of the current ecosystem versus the state after a real Crypto.com OTC sink is connected |
 | **Provider-facing source to CEX package** | [03-deployment/PROVIDER_FACING_PACKAGE_SOURCE_TO_CEX.md](03-deployment/PROVIDER_FACING_PACKAGE_SOURCE_TO_CEX.md) — strict provider-facing package covering expectations, flow presentation, questions, and a first 30-day ramp plan |
 | **Mr. Promod Uniswap V2 liquidity program** | [03-deployment/PROMOD_UNISWAP_V2_LIQUIDITY_PROGRAM.md](03-deployment/PROMOD_UNISWAP_V2_LIQUIDITY_PROGRAM.md) — wrapped-depth-first Uniswap V2 rollout for cW* and cWAUSDT on bridged public networks |