[NePreby]

Summary

Closes #15.

Adds comprehensive technical architecture documentation and Mermaid diagrams in docs/architecture.md, linked directly from README.md:

1. System Overview: End-to-end component interaction between the Web UI, CI/CD bounty runner, client-side JCS verifier, Soroban smart contracts (StreamRouter, CascadeSplitter), and Stellar Asset Contracts (SAC).
2. StreamRouter Accrual & Checkpointing:
   • Formal mathematical derivation of $streamed(t)$ and $withdrawable(t)$.
   • Idle gap protection upon top_up: checkpointing formula ensuring recipients are not credited for exhausted intervals.
   • Mermaid sequence diagram depicting lifecycle: stream escrow creation, continuous accrual, recipient withdrawal, dry-run top-up checkpointing, and cancellation split settlement.
3. CascadeSplitter Recursive Routing:
   • Tree cascade mechanics: basis points allocation ($10{,}000$ BPS total, max 32 splits, max depth 3).
   • Conservation of funds invariant: rounding dust and unallocated reserves settle with the table owner at each depth level ($\sum payouts = amount$).
   • Mermaid flowchart of the recursive route() algorithm with cycle termination.
   • Concrete example graph showing multi-hop downstream settlement.
4. Audit Receipts Architecture:
   • RFC-8785 (JCS) canonicalization pipeline with SHA-256 digests and Horizon ledger anchor verification.

Payout Wallet:

• TRX Tron (TRC20): TMqmJjRgVS21NL2eFtfyHciTxvE4BqGmEv