* Add ResourceSecurity screening for templated resources (defaults on)
* Add tests for resource path-security screening
* Document resource path-security; fix ty in tests
* Carry child template security policy through provider mount
Preserve a mounted template's explicit ResourceSecurity (per-param
exemptions or a deliberate opt-out) through FastMCPProviderResourceTemplate.wrap
so the parent read chokepoint honours it instead of the parent default.
* Defer mcp SDK import so fastmcp.resources loads without the [mcp] extra
* Make resource path-security docs examples self-contained and runnable
* Match exempt_params under both hyphen and underscore spellings
Template placeholders like {git-ref} extract as git_ref, so an exemption
written with the natural URI-template spelling never matched.
* Docs: describe net-depth traversal rule accurately; make example runnable
The screening only rejects .. segments that escape the starting depth
(foo/../bar passes) — saying any standalone .. is rejected overstated
the guarantee. Also define DOCS_ROOT so the example runs.
* Turn OpenTelemetry instrumentation on by default with explicit off-switch
Add FASTMCP_ENABLE_TELEMETRY setting (default true) and mcp.protocol.version
span attribute for SDK parity.
* Make disabled telemetry a transparent pass-through, not a NoOpTracer
The stock NoOpTracer.start_as_current_span attaches a NonRecordingSpan, hijacking the current OTel context from any enclosing application span. When telemetry is disabled, get_tracer() now returns a non-attaching pass-through tracer so trace.get_current_span() inside handlers still resolves to the caller's span.
