chore: migrate rust/query_stats to icp-cli

[marc0olo]

Summary

Migrates rust/query_stats from dfx to icp-cli.

Removed: dfx.json, BUILD.md, query-stats.did, .devcontainer/

Changed:

• Rust source moved from src/lib.rs to backend/lib.rs with a workspace Cargo.toml
• ic-cdk bumped to 0.20; replaced removed ic_cdk::api::management_canister with ic-cdk-management-canister = "0.1.1"; replaced removed ic_cdk::id() with ic_cdk::api::canister_self()

Added:

• icp.yaml with @dfinity/rust@v3.3.0 recipe
• test.sh with 2 tests: load() returns a non-zero timestamp, get_query_stats() returns all four stat fields
• test-stats.sh — mirrors the Motoko example: makes 13 --query calls every 3s and polls until Number of calls is non-zero (up to 30s)
• rust-toolchain.toml with wasm32-unknown-unknown target
• rust-query_stats job in .github/workflows/query_stats.yml using icp-dev-env-rust:1.0.1

Test plan

• icp network start -d && icp deploy && bash test.sh passes locally
• bash test-stats.sh shows non-zero stats after ~12s locally
• CI rust-query_stats job passes

🤖 Generated with Claude Code

[Copilot]

⚠️ Not ready to approve

The Motoko workflow step runs make test but the example directory has no Makefile, so CI will fail unless the workflow is corrected.

Pull request overview

Migrates the rust/query_stats example from dfx to icp-cli, aligning it with the repo’s canonical Rust example layout (workspace + backend/ crate), updated dependencies, and icp-cli based CI/testing.

Changes:

• Replaced dfx project files with icp.yaml, a Rust workspace Cargo.toml, and updated Cargo.lock for the new dependency set.
• Moved canister source to backend/lib.rs, upgraded to ic-cdk = 0.20, and switched to ic-cdk-management-canister APIs (plus export_candid!()).
• Added test.sh + test-stats.sh, and extended the existing query_stats GitHub Actions workflow with a Rust job.

File summaries

File	Description
rust/query_stats/test.sh	Adds a fast smoke test for load() and get_query_stats() output shape.
rust/query_stats/test-stats.sh	Adds a polling/load script to demonstrate non-zero query stats locally.
rust/query_stats/rust-toolchain.toml	Ensures the wasm target is available for builds.
rust/query_stats/README.md	Updates documentation for icp-cli usage and explains query-stats behavior/requirements.
rust/query_stats/query-stats.did	Removes the old dfx-era .did file.
rust/query_stats/icp.yaml	Adds icp-cli project definition for the Rust backend canister.
rust/query_stats/dfx.json	Removes the old dfx project definition.
rust/query_stats/Cargo.toml	Converts the root crate into a workspace.
rust/query_stats/Cargo.lock	Updates lockfile for the workspace + upgraded deps (ic-cdk, etc.).
rust/query_stats/BUILD.md	Removes ICP Ninja / dfx-oriented build instructions.
rust/query_stats/backend/lib.rs	Ports canister code to new layout and updated management-canister APIs; exports candid.
rust/query_stats/backend/Cargo.toml	Adds backend crate definition and updated dependencies.
rust/query_stats/.devcontainer/devcontainer.json	Removes per-example devcontainer config.
.github/workflows/query_stats.yml	Adds Rust job trigger/run and adjusts Motoko job command (currently problematic).

Copilot's findings

• Files reviewed: 13/14 changed files
• Comments generated: 2

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