Title:
FEATURE: Togglable server-side (Docker) log streaming debug endpoint with dual-authentication

Problem / Requirement:
Administrators and developers need a lightweight, real-time method to stream application stdout/stderr logs (which correspond exactly to Docker container logs in standard setups) directly through the API. This enables easier live debugging without requiring full Docker daemon or terminal access.

Success Criteria:
1. Lightweight Log Streaming: Streams process standard output/error (representing Docker logs) via Server-Sent Events (SSE). Keep a rolling buffer of the last 1000 lines in memory.
2. Dual-Authentication with Webhook Secret Bypass:
   - Accepts existing session cookie (emby_user) with administrative credentials.
   - Accepts standard HTTP Basic Authentication (Authorization: Basic <base64>) using Emby administrator username/password credentials.
   - Accepts X-Webhook-Secret header matching the SOFARR_WEBHOOK_SECRET environment variable for programmatic bypass.
3. Runtime Configuration Toggle: Enableable using a runtime environment variable ENABLE_LOG_STREAM=true (defaulting to false/disabled). When disabled, returns a 403 Forbidden response.
4. API Spec Documentation: Documented in server/openapi.yaml under the /api/debug/logs endpoint, including the query format and response schemas.
