feat: add WIL-based TraceLogging ETW telemetry (experimental)

[RamonArjona4]

📖 Description

Add experimental telemetry support using the tracelogging crate for
pure Rust ETW event emission. No C++ shim or WIL dependency required.

• New mxc_telemetry crate with define_provider! and write_event! for
  MXC.Execution and MXC.Error events using COMMON_MXC_PARAMS struct fields
• build.rs generates provider_def.rs with optional group_id based on
  MXC_TELEMETRY_PROVIDER_GROUP_GUID env var for internal builds
• wxc_common::telemetry module: config resolution, sanitize_error_message()
  (strips Windows paths, Unix paths, UNC paths, and URL credentials), event types
  with bounded FailureReason enum
• Schema, config parser, and SDK types extended with telemetry.enabled field
• Telemetry callsites in wxc and lxc binaries emit execution and error events
• Experimental feature: requires --experimental flag and telemetry.enabled
  in the JSON config
• Non-Windows: all telemetry functions compile as no-ops
• Design doc at docs/telemetry-wil-integration.md with architecture,
  feature comparison table, and GUID override mechanism

Build integration (pipeline GUID substitution, license override script)
will follow in a separate PR.

🔗 References

#492

🔍 Validation

Built locally and ran unit tests. Validated that ETW events fire when build configuration is not set to allow telemetry.
Validated that telemetry appears as expected in the UTC when telemetry provider is correctly enabled.

✅ Checklist

• [ x] Signed the Contributor License Agreement
• [ x] Linked to an issue
• [ x] Updated documentation (if applicable)
• Updated Copilot instructions (if build, architecture, or conventions changed)

📋 Issue Type

• Bug fix
• [ x] Feature
• Task

---

Microsoft reviewers: PR builds don't auto-run (ADO policy). Comment /azp run
to start MXC-PR-Build. See docs/pull-requests.md.

Microsoft Reviewers: Open in CodeFlow

[Copilot]

Pull request overview

Adds an experimental TraceLogging ETW telemetry pipeline to MXC, including a WIL-based C++ shim with Rust wrappers, config/schema plumbing (experimental.telemetry.enabled), internal-build GUID/license override hooks, and validation scripts/tests/docs.

Changes:

• Introduces mxc_wil_telemetry (build-time WIL header acquisition + C++ TraceLogging provider shim + Rust FFI wrappers).
• Adds wxc_common::telemetry module and wires telemetry init/emit/shutdown into wxc-exec and lxc-exec behind --experimental + config flag.
• Adds schema/docs/examples/tests and ADO pipeline steps for internal GUID substitution + SDK license override.

Reviewed changes

Copilot reviewed 28 out of 30 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
tests/scripts/run_telemetry_etw_smoke_test.ps1	Adds an admin-required ETW capture smoke test script for the public provider GUID.
tests/scripts/run_telemetry_build_override_test.ps1	Adds a validation script for MXC_TELEMETRY_CONFIG_OVERRIDE build behavior.
tests/examples/28_telemetry_enabled.json	Adds an example config enabling experimental telemetry.
src/testing/wxc_e2e_tests/tests/e2e_windows.rs	Adds ignored Windows E2E tests for telemetry enabled/disabled paths.
src/testing/wxc_e2e_tests/src/lib.rs	Adds run_wxc_example() helper for running configs from tests/examples/.
src/mxc_wil_telemetry/src/lib.rs	Implements Rust-safe wrappers around the C++ telemetry shim (no-op on non-Windows).
src/mxc_wil_telemetry/shim/mxc_telemetry_shim.h	Declares the extern “C” surface for Rust FFI.
src/mxc_wil_telemetry/shim/mxc_telemetry_shim.cpp	Implements WIL TraceLogging provider + Part B fields + event emission.
src/mxc_wil_telemetry/Cargo.toml	Adds the new crate with build dependencies for download/extract/compile.
src/mxc_wil_telemetry/build.rs	Downloads/extracts WIL headers, applies override, compiles shim (Windows-only).
src/core/wxc/src/main.rs	Initializes telemetry from config and emits execution/error events on completion.
src/core/wxc_common/src/telemetry/mod.rs	Adds telemetry module entrypoint: enablement logic + init/shutdown.
src/core/wxc_common/src/telemetry/events.rs	Defines telemetry event types, sanitization, and emit wrappers.
src/core/wxc_common/src/models.rs	Adds experimental.telemetry config model (TelemetryConfig).
src/core/wxc_common/src/lib.rs	Exposes telemetry module from wxc_common.
src/core/wxc_common/src/config_parser.rs	Parses experimental.telemetry.enabled into TelemetryConfig + tests.
src/core/wxc_common/Cargo.toml	Links wxc_common against the new mxc_wil_telemetry crate.
src/core/lxc/src/main.rs	Mirrors telemetry init/emit wiring for the Linux executor (no-op behavior).
src/Cargo.toml	Adds mxc_wil_telemetry to the Rust workspace + workspace deps.
src/Cargo.lock	Updates lockfile for new crate + added build dependencies.
sdk/src/types.ts	Adds TypeScript TelemetryConfig and experimental.telemetry typing.
scripts/apply-license-override.ps1	Adds script for internal license override injection/restoration.
schemas/dev/mxc-config.schema.0.7.0-dev.json	Extends dev schema with experimental.telemetry.enabled.
README.md	Documents experimental telemetry behavior and adds doc link.
docs/telemetry-wil-integration.md	Adds detailed architecture and internal-build override documentation.
docs/schema.md	Updates schema docs to include experimental.telemetry.
build/telemetry/packages.config	Adds private NuGet package manifest for internal telemetry group GUID header.
build/telemetry/nuget.config	Adds scoped nuget.config with <clear/> for deterministic internal restore.
.gitignore	Ignores restored private telemetry package artifacts and license backup.
.azure-pipelines/templates/Rust.Build.Job.yml	Adds official-build steps for internal NuGet restore + env var injection + license override.

[MGudgin]

Can we just use these:

• https://crates.io/crates/tracelogging
• https://crates.io/crates/tracelogging_dynamic

[Copilot]

Pull request overview

Copilot reviewed 28 out of 30 changed files in this pull request and generated 5 comments.

[Copilot]

Pull request overview

Copilot reviewed 21 out of 23 changed files in this pull request and generated 5 comments.

[Copilot]

⚠️ Not ready to approve

There are correctness/privacy issues to address (invalid $schema reference in the new telemetry example and incomplete Unix path sanitization that can leak /Users/<name> into telemetry).

Copilot's findings

• Files reviewed: 22/24 changed files
• Comments generated: 8

Note

Your feedback helps us improve the quality of this feature.
Please use 👍 or 👎 to tell us whether this assessment is correct.

[Copilot]

⚠️ Not ready to approve

A few correctness/robustness issues were found in telemetry sanitization and failure classification that can lead to misleading or malformed telemetry output.

Copilot's findings

• Files reviewed: 21/22 changed files
• Comments generated: 6

Note

Your feedback helps us improve the quality of this feature.
Please use 👍 or 👎 to tell us whether this assessment is correct.