chore: initialize monorepo with project scaffolding, configs, and CI setup

docs/blockchain_node.md

@@ -0,0 +1,41 @@
+# Blockchain Node – Task Breakdown
+
+## Status (2025-09-27)
+
+- **Stage 1**: Design and scaffolding remain TODO; no implementation committed yet. Coordinator receipts now include historical persistence and attestations, so blockchain receipt ingestion should align with this schema when development begins.
+
+
+## Stage 1 (MVP)
+
+- **Project Scaffolding**
+  - Create `apps/blockchain-node/src/` module layout (`types.py`, `state.py`, `blocks.py`, `mempool.py`, `consensus.py`, `rpc.py`, `p2p.py`, `receipts.py`, `settings.py`).
+  - Add `requirements.txt` with FastAPI, SQLModel, websockets, orjson, python-dotenv.
+  - Provide `.env.example` with `CHAIN_ID`, `DB_PATH`, bind addresses, proposer key.
+
+- **State & Persistence**
+  - Implement SQLModel tables for blocks, transactions, accounts, receipts, peers, params.
+  - Set up database initialization and genesis loading.
+  - Provide migration or reset script under `scripts/`.
+
+- **RPC Layer**
+  - Build FastAPI app exposing `/rpc/*` endpoints (sendTx, getTx, getBlock, getHead, getBalance, submitReceipt, metrics).
+  - Implement admin endpoints for devnet (`mintFaucet`, `paramSet`, `peers/add`).
+
+- **Consensus & Block Production**
+  - Implement PoA proposer loop producing blocks at fixed interval.
+  - Integrate mempool selection, receipt validation, and block broadcasting.
+  - Add basic P2P gossip (websocket) for blocks/txs.
+
+- **Receipts & Minting**
+  - Wire `receipts.py` to coordinator attestation mock.
+  - Mint tokens to miners based on compute_units with configurable ratios.
+
+- **Devnet Tooling**
+  - Provide `scripts/devnet_up.sh` launching bootstrap node and mocks.
+  - Document curl commands for faucet, transfer, receipt submission.
+
+## Stage 2+
+
+- Upgrade consensus to compute-backed proof (CBP) with work score weighting.
+- Introduce staking/slashing, replace SQLite with PostgreSQL, add snapshots/fast sync.
+- Implement light client support and metrics dashboard.