feat: rewrite portfolio cards for recruiter-scannable impact

- Reorder projects: Poimen Orchestration → Memory → Homelab → RBC → AWS
- Add Poimen (Ποιμήν) timeline card with Graph-RAG + Temporal pillars
- Rewrite all 6 timeline cards: bold frameworks, quantified impact, emoji sections
- Update Homelab card: production-grade framing, milestone-driven bullets
- Fix CI status links: update API allowlist for riotpiao-poimen org repos
- Fix commit SHA: Dockerfile NEXT_PUBLIC_COMMIT_SHA + CI --build-arg
- Connect Poimen Memory card as 'the memory layer behind Poimen'

Dockerfile

@@ -17,7 +17,7 @@ COPY . .
 
 # Pass commit SHA at build time
 ARG COMMIT_SHA=dev
-ENV COMMIT_SHA=${COMMIT_SHA}
+ENV NEXT_PUBLIC_COMMIT_SHA=${COMMIT_SHA}
 
 # Build Next.js app
 RUN pnpm run build