Create architecture.md

Author: duythien

docs/architecture.md

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+# Component-Level Architecture
+```
++===========================================================+
+|                    QuantumOS Blockchain                   |
+|               (Substrate Runtime with Custom Pallets)     |
+|-----------------------------------------------------------|
+| - pallet-task: Task creation, assignment, reward logic    |
+| - pallet-verifier: ZKP & result validation                |
+| - pallet-balances / staking / governance                  |
++============================▲==============================+
+                             |
+              Submit result + proof (tx)
+                             |
++============================|==============================+
+|                     Miner Node (Rust Daemon)              |
+|-----------------------------------------------------------|
+| [ TaskFetcher ] <--- JSON-RPC / Subxt ---> Chain API      |
+| [ PhysicsEngine ]: Runs simulation (e.g., spin model)     |
+| [ ZK-Prover ]: Generates SNARK/STARK proof of work        |
+| [ IPFSUploader ]: Uploads raw result to IPFS/Filecoin     |
+| [ Submitter ]: Sends CID + ZKP to chain                   |
++============================|==============================+
+                             |
+                             v
++===========================================================+
+|        Off-chain Storage (IPFS / Filecoin integration)    |
+| - Store simulation outputs (data, logs, models, etc.)     |
+| - Referenced by CID in blockchain state                   |
++===========================================================+
+
+                             ▲
+                             |
+                             v
+
++========================= QuantumOS dApp ==========================+
+| - Web UI to browse, create, and verify simulation tasks           |
+| - Connect wallet (Polkadot.js, Talisman, etc.)                   |
+| - Display CID-linked results + proof status                      |
+| - Explorer, Miner leaderboard, staking, governance               |
++==================================================================+
+
+```
+## Key Components
+- Component	Description
+- pallet-task	On-chain logic to define simulation tasks
+- pallet-verifier	Verifies result + attached ZKP
+- PhysicsEngine	Runs simulation workload (off-chain)
+- ZK-Prover	Generates zero-knowledge proof of correctness
+- IPFSUploader	Stores result data to decentralized storage
+- dApp	Web-based frontend to interact with the chain