feat: finalize platform for challenge submission

VIDEO_DEMO.md

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+# NeuroScale — Video Demo Guide
+
+> **Recommendation:** Record a single-take, unedited terminal video of `bash scripts/smoke-test.sh`. Let the test speak for itself.
+
+---
+
+## Why This Approach
+
+The smoke test IS the demo. It validates every milestone automatically:
+
+| Time | What Judges See |
+|------|----------------|
+| 0:00–0:05 | `bash scripts/smoke-test.sh` typed and executed |
+| 0:05–0:15 | Prerequisites pass — cluster is reachable |
+| 0:15–0:45 | Milestone A: GitOps spine — ArgoCD healthy, drift self-heal in ~20s |
+| 0:45–1:10 | Milestone B: AI serving — KServe ready, prediction returns `{"predictions":[1,1]}` |
+| 1:10–1:30 | Milestone C: Golden Path — Backstage up, scaffolder output exists |
+| 1:30–2:00 | Milestone D: Guardrails — Kyverno denies non-compliant manifest live |
+| 2:00–2:30 | Milestone F: Production hardening — ApplicationSet, quotas, OpenCost, root-container denial |
+| 2:30–2:40 | Final results: **PASS 21 / FAIL 0 / SKIP 1** |
+
+No editing. No narration. No flashy transitions. The terminal output is the mathematical proof.
+
+---
+
+## How to Record
+
+### Option 1: asciinema (Terminal Recording)
+
+```bash
+# Install
+pip install asciinema
+
+# Record
+asciinema rec demo.cast -c "bash scripts/smoke-test.sh"
+
+# Upload (public link)
+asciinema upload demo.cast
+```
+
+### Option 2: Screen Recording (for DEV post embed)
+
+```bash
+# On macOS: Cmd+Shift+5 → Record selected area → select terminal
+# On Linux: OBS Studio or SimpleScreenRecorder
+# On Windows: Win+G → Record
+
+# Steps:
+# 1. Maximize terminal window
+# 2. Start recording
+# 3. Type: bash scripts/smoke-test.sh
+# 4. Let it run to completion
+# 5. Stop recording
+```
+
+### Option 3: Quick Validation (No Recording)
+
+```bash
+# Just run it — the output itself is the proof
+bash scripts/smoke-test.sh
+
+# Paste the output into your DEV post as a code block
+```
+
+---
+
+## Key Rules
+
+1. **Single take** — no cuts, no edits
+2. **Show the command being typed** — judges need to see `bash scripts/smoke-test.sh`
+3. **Let the full output scroll** — every PASS line builds confidence
+4. **End on the summary** — `PASS 21 / FAIL 0` is your closing argument
+5. **Under 3 minutes** — the smoke test itself runs in ~2 minutes
+
+---
+
+## Pre-Recording Checklist
+
+```bash
+# Ensure cluster is healthy
+kubectl cluster-info
+
+# Ensure all pods converged (wait 2-3 min after bootstrap)
+kubectl -n argocd get applications
+
+# Clear terminal
+clear
+
+# Record
+bash scripts/smoke-test.sh
+```