fix(docs): drop private intra-doc links

ci-checks' `cargo doc -D warnings` step failed:
`rustdoc::private_intra_doc_links` — public docs for `allowed_hosts`,
`spawn_with`, and the `doctor` module linked to private items
(`validate`, `stderr_pump`, the cmd_doctor check submodules).
Converted the intra-doc links to plain code spans; wording and the
public API are unchanged. Caught by /release-checks (clippy + tests
were green but rustdoc was not run by the feature agents).

Author: Teerapat-Vatpitak

crates/mcp-loadtest-cli/src/cmd_doctor/mod.rs

@@ -8,10 +8,10 @@
 //!
 //! Split across submodules to stay under the 300-line production cap and to
 //! keep each check independently unit-testable:
-//! - [`python`] — Python interpreter on PATH
-//! - [`server`] — MCP server `initialize` smoke (only with `--server`)
-//! - [`runs`]   — stale `runs/` accumulation
-//! - [`toolchain`] — Windows MSVC-vs-GNU mismatch
+//! - `python` — Python interpreter on PATH
+//! - `server` — MCP server `initialize` smoke (only with `--server`)
+//! - `runs` — stale `runs/` accumulation
+//! - `toolchain` — Windows MSVC-vs-GNU mismatch
 //!
 //! See [ADR 0014](../../../docs/adr/0014-error-hints-explain-doctor.md).
 

crates/mcp-loadtest/src/config.rs

@@ -95,7 +95,7 @@ pub struct ServerConfig {
     /// loopback / link-local IP literals are always blocked unless the exact
     /// literal is listed here (operator escape hatch, e.g. `"127.0.0.1"` for
     /// local testing). No wildcard / suffix matching — entries must be bare
-    /// hostnames (no scheme / port / path); validated by [`validate`].
+    /// hostnames (no scheme / port / path); validated at config load.
     #[serde(default)]
     pub allowed_hosts: Vec<String>,
 }

crates/mcp-loadtest/src/protocol/transport/stdio.rs

@@ -99,7 +99,7 @@ impl StdioTransport {
     ///
     /// For the capture/tee modes a background pump task drains the piped
     /// stderr; it is cancellation-aware and joined on shutdown so the file is
-    /// flushed (see [`stderr_pump`]).
+    /// flushed (see the `stderr_pump` submodule).
     ///
     /// `kill_on_drop(true)` ensures a panicking parent doesn't leave zombie
     /// children behind.