[codex] Introduce Salacia v0.2 harness runtime

[StartripAI]

What changed

This PR introduces the first v0.2 harness/runtime flow for Salacia.

• adds program.md -> blueprint -> context -> run -> judge -> trace -> eval
• promotes repo context and repo map into runtime modules
• adds run session artifacts and judge reports
• refreshes README and GitHub Pages copy around the harness narrative
• updates release/eval surfaces toward shared evidence outputs

Why

Salacia should present as the harness/runtime between a repository and a coding agent, not only as a prompt/plan enhancer. This change establishes the new public flow and the underlying runtime artifacts to support it.

User impact

Users can now:

• initialize a repo with program.md
• compile a blueprint with salacia design
• execute a bounded harness run with salacia run
• inspect decisions with salacia judge and salacia trace
• use salacia eval as the unified benchmark/superiority surface

Validation

• npm run build
• npm test

[StartripAI]

Merged directly to main per request.