Refresh public v0.3 product state and roadmap

[Litju]

Summary

• Runtime code is unchanged.
• Documentation now matches the qualified v0.3 state.
• Stale v0.1/v0.2 preview and qualification language is removed.
• The current Detection & Response architecture and Web/OpenTUI/API surfaces are documented.
• v0.4 DFIR & Security Operations is identified as the next milestone, not an implemented capability.
• Qualification and deterministic export boundaries remain conservative.
• No private Scientific SecScanMonitor content is included.

Qualification

• Deterministic export: 307 files, SHA-256 e81ecbb169b51e701b9dc9844b758f80183daf469d8ef310eeec618b1d466ee2
• Runtime code delta: none
• Python, mypy, Ruff, Web, OpenTUI, Playwright/accessibility: PASS
• Gitleaks, TruffleHog, OSV-Scanner, pip-audit, npm audit: PASS
• License and SBOM hashes unchanged
• Scientific, secret, and private-path leakage: 0

No production deployment, tag, release, response executor, or DFIR implementation is included.