fix: make telemetry optional

[antirotor]

Changelog Description

Make the opentelemetry in image optional.

Additional review information

OpenTelemetry in docker image was enabled by default, this is making it optional (disabled by default). It can be enabled using AYON_MCP_OTEL_ENABLED

[Copilot]

Copilot review overview

🟡 Changes recommended

The Compose deployment still requires the external observability network when telemetry is disabled, and the new conditional behavior lacks tests.

Review effort: Balanced
Findings: 1 · 2

Open (3)

• Telemetry-disabled deployment still requires the observability network · New
• Configuration documentation misstates environment variable count · New
• Add tests for opt-in telemetry middleware behavior · New

What changed in this PR

Makes OpenTelemetry opt-in for the Dockerized MCP service.

Changes:

• Adds the AYON_MCP_OTEL_ENABLED flag.
• Conditionally enables instrumentation and token metrics.
• Aligns the service image tag with the add-on version.

File	Description
services/​mcp/​Dockerfile	Selects instrumented or standard startup.
services/​mcp/​docker-compose.yml	Adds the telemetry flag.
services/​mcp/​ayon_mcp/​server.py	Conditionally registers metrics middleware.
README.md	Documents telemetry configuration.
package.py	Updates image tagging and telemetry defaults.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.