feat: Add Oghma RAG Proxy for SkyrimNet lore injection

RAG proxy that intercepts SkyrimNet LLM requests and enriches them
with relevant Tamrielic lore from CHIM's Oghma Infinium database.

Features:
- FastAPI proxy compatible with OpenAI API
- ChromaDB semantic search for lore retrieval
- NPC profile extraction from SkyrimNet prompts
- Google Sheets ingestion for CHIM's Oghma data
- Kubernetes deployment manifests
- Debug endpoint for RAG operation monitoring

Collections ingested to iris-dev ChromaDB:
- oghma_lore: 1951 entries (scholar knowledge)
- oghma_basic: 1949 entries (commoner knowledge)
- oghma_visual: 1151 entries (Omnisight perception)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

oghma-proxy/README.md

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+# Oghma RAG Proxy
+
+RAG (Retrieval-Augmented Generation) proxy for SkyrimNet that injects Tamrielic lore into NPC conversations based on their knowledge profile.
+
+## Overview
+
+This proxy sits between SkyrimNet and your LLM inference endpoint (OpenRouter/vLLM), enriching prompts with relevant lore from CHIM's Oghma Infinium database.
+
+**Key Features:**
+- Zero changes to SkyrimNet — just change the endpoint URL
+- NPC-aware filtering — guards don't know mage secrets
+- Two-tier knowledge — scholars get deep lore, commoners get basics
+- ChromaDB-powered semantic search
+
+## Quick Start
+
+```bash
+# Install
+pip install -e .
+
+# Ingest Oghma lore into ChromaDB
+python -m oghma_proxy.ingest --host iris-dev.eachpath.local --port 35000
+
+# Run proxy
+python -m oghma_proxy.main
+```
+
+## Configuration
+
+Copy `config.yaml` to `config.local.yaml` and customize:
+
+```yaml
+upstream:
+  url: https://openrouter.ai/api/v1
+  api_key: ${OPENROUTER_API_KEY}
+
+chromadb:
+  host: iris-dev.eachpath.local
+  port: 35000
+```
+
+## Kubernetes Deployment
+
+```bash
+kubectl apply -k k8s/
+```
+
+## Architecture
+
+See [TECHNICAL-SPEC.md](TECHNICAL-SPEC.md) for full design documentation.
+
+---
+
+Part of the [nimmerverse](https://github.com/dafit/nimmerverse) project.