Add auth middleware to Ollama /tags endpoint

[heliosran]

Motivation

• Ensure the Ollama GET /api/tags endpoint is protected by the same OpenAI API key authentication as the other Ollama routes to avoid an unintentionally public /api/* route.

Description

• Add openaiAuthMiddleware() to the ollama.get("/tags", ...) declaration in src/routes/ollama.ts, changing it to ollama.get("/tags", openaiAuthMiddleware(), async (c) => { ... }).

Testing

• Ran rg 'ollama\.(get|post)\(' -n src/routes/ollama.ts && rg 'openai\.(get|post)\(' -n src/routes/openai.ts and inspected docs/authentication.md to verify all exposed /api routes now include the auth middleware; the checks succeeded.

---

Codex Task