chore(harness): make repository agent-ready

Add concise routed context, task-aware agent roles, focused skills, and structured learning promotion.\n\nUnify local development and workspace tooling, add layered test and E2E verification, harden MCP authentication, and gate deployment behind verification and explicit production promotion.

.codex/skills/question-pack/SKILL.md

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+---
+name: question-pack
+description: Create or review Sauci question-pack content and its local migration/seed representation. Use for pack generation, inverse pairs, intensity, targeting, or content quality.
+---
+
+# Sauci question packs
+
+Inspect existing packs before generating to avoid duplication.
+
+- Write proposals, not interview questions; use gender-neutral “your partner”.
+- Avoid time-bound words such as tonight, now, or today.
+- Symmetric activities have no partner text.
+- Every asymmetric activity has the reversed counterpart and a correct
+  `inverse_of` link; inverse pairs are not duplicates.
+- Intensity 1 is non-sexual bonding, 2 romantic/flirty, 3 light sexual, 4
+  explicit, and 5 advanced/BDSM. Check surrounding content before deciding.
+- Preserve targeting and required-prop semantics; do not infer them from wording.
+
+Return metadata, content, inverse/link validation, and distribution statistics.
+Database changes follow the `db-migration` skill and require local verification.