docs: record Base Sepolia live test run

Documents the deployed contract addresses, live test tanda, VRF wiring,
and what was proven against a real chain. The protocol is live on Base
Sepolia with all 5 contracts verified on Basescan and a 3-participant
tanda mid-lifecycle (cycle 1 triggerable at startTimestamp + 86400).

This is the testnet milestone before mainnet deploys.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: GeObts

deployments/.gitignore

@@ -1,2 +1,3 @@
-*
-!.gitignore
+# Ignore per-chain deployment JSON outputs (chainId.json files produced by Deploy.s.sol)
+# Markdown docs and other tracked artifacts are NOT ignored.
+*.json

deployments/base-sepolia-test-run.md

@@ -0,0 +1,34 @@
+# Mi Tanda Base Sepolia — Live Test Run
+Date: 2026-05-28
+Network: Base Sepolia (chainId 84532)
+
+## Deployed Contracts (all verified on Basescan)
+- TandaManager: 0x6341E995bb0C665A36971368E4D5860A2ad46E2a
+- Tanda implementation: 0x52ff9dBb6124E3EBCEbA75A875A43d1752c0F277
+- MitandaPassNFT: 0x00e904e04156d13Eb35D8404053e2eDE02aDAB96
+- MitandaReceiptNFT: 0x1CB29BCb3Dc1bF7B4A7083F779c488BF4a55573d
+- MitandaCompletionNFT: 0x7Ee43871c368901652F9b15A2ed28603Bc7A0bB9
+
+## Live Test Tanda
+- Tanda address: 0xa0B74E35889686Fb4056FAE0B96F7b51cCb33972
+- tandaId: 1
+- Contribution: 5 USDC per cycle
+- 3 participants: Alice/Bob/Carol
+- Payout order: [1, 0, 2] → Bob, Alice, Carol
+- Status: ACTIVE, cycle 1 payable at startTimestamp + 86400
+
+## VRF Wiring
+- Subscription ID: 48186721464479422715819618384301755026938302239233192020450741762336434827114
+- Add consumer tx: 0xb005e2a5c32823d20269207fa202363207c8708f9ce4aaca2a48a50932668d3c
+- Fund tx: 0xf6dbc1bf923f65965526f36be17012fdf51fe7a1af9a7ee1ed7fee8ec62ee572
+- Subscription balance: 0.04 ETH
+
+## What Was Proven
+- CREATE2 deterministic deployer integration
+- EIP-1167 clone deployment + initialization on real chain
+- Manager → Tanda → NFT call path
+- Real Circle USDC transferFrom against fresh clone
+- Chainlink VRF v2.5 end-to-end (request → callback → Fisher-Yates → state transition)
+- 2 gwei gas lane is correct and fulfills
+- 2.5M callback gas limit has ample headroom for 3-participant shuffle
+- Soulbound Pass NFT minting via onlyTanda gate