feat: initial shira-hermes service

Shira AI backend using OpenAI-compatible agent with tool-calling loop,
replacing the smart-assistant route in ai-gateway.

Components:
- FastAPI adapter (same HTTP contract as ai-gateway)
- Agent runner with agentic tool-calling loop via ai-gateway /v1/chat/completions
- EspoCRM REST API client
- 20 MCP tools (CRM, documents, legal assistance)
- Prompt builder ported from ai-gateway JS to Python
- SOUL.md personality definition
- Dockerfile for Coolify deployment

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.env.example

@@ -0,0 +1,17 @@
+# shira-hermes configuration
+PORT=3000
+
+# Authentication — same key used by SmartAssistant to call this service
+API_KEY=
+
+# ai-gateway — OAuth proxy to Claude (internal Docker network)
+AI_GATEWAY_URL=http://ai-gateway:3000
+AI_GATEWAY_API_KEY=
+
+# Claude model (passed through to ai-gateway)
+CLAUDE_MODEL=sonnet
+MAX_OUTPUT_TOKENS=4096
+
+# EspoCRM — for MCP tools
+ESPOCRM_URL=https://espocrm.dev.marcus-law.co.il
+ESPOCRM_API_KEY=