EPIC: Public-ready documentation overhaul

[krisoye]

Context

Making the repo public for portfolio presentation. The current README has outdated technical details (SSE transport, requirements.txt, black formatter), internal infrastructure references (game-da-god IP, project board links), an "Under Development" framing, and a dead link to docs/ARCHITECTURE.md. It needs to present the project as a polished, production-quality tool.

Scope

1. Rewrite README.md — Professional, employer-facing, no internal details
2. Create docs/ARCHITECTURE.md — Lightweight component/data flow overview
3. Update LICENSE — Switch to MIT (align with pyproject.toml)
4. Scrub internal references — Remove IPs, server names, internal links

Design Principles

• Frame as a general-purpose audio analysis tool (not interview-specific)
• Highlight engineering maturity: 440+ tests, CI matrix, systemd hardening, GPU support
• Show example output (abbreviated JSON) to demonstrate capabilities
• Add CI/Python/License badges
• Keep deployment docs but genericize (no private infra names)

Sub-Issues

• Rewrite README.md for public portfolio #66 — Rewrite README.md for public portfolio
• Create lightweight docs/ARCHITECTURE.md #67 — Create lightweight docs/ARCHITECTURE.md
• Add MIT LICENSE file and align references #68 — Add MIT LICENSE file and align references

Cross-Repo (Same Initiative)

• Rewrite README.md for public portfolio presentation document-analysis-mcp#24 — Rewrite document-analysis-mcp README
• Rewrite README.md for public portfolio presentation knowledge-bank-tools#111 — Rewrite knowledge-bank-tools README

Acceptance Criteria

• No internal IPs, server names, or private project links in any committed file
• README accurately reflects current transport (Streamable HTTP), install method (pyproject.toml), and commands
• docs/ARCHITECTURE.md exists with component diagram and data flow
• LICENSE file is MIT
• A stranger can understand what this project does and how to use it from the README alone