Manual Execution

[raphael-goetz]

Resolves: ##138

[Copilot]

Pull request overview

Adds a new “manual” CLI for executing validation flows (including remote node execution via NATS), factors shared test-case loading/types into a new tests-core crate, and updates flow fixtures/executor logic to support definition_source-based remote detection.

Changes:

• Add crates/manual binary to execute a single flow case from a JSON file, with optional remote execution via NATS.
• Introduce crates/tests-core to share flow test-case structs and JSON loading helpers; update crates/tests to use it.
• Add definition_source: "taurus" to sample flows and adjust executor remote detection behavior for empty definition_source.

Reviewed changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
flows/03_for_each.json	Adds definition_source to node functions in the flow fixture.
flows/02_return_flow_input.json	Adds definition_source to node functions in the flow fixture.
flows/01_return_object.json	Adds definition_source to node functions in the flow fixture.
crates/tests/src/main.rs	Switches to shared tests-core types/helpers and refactors test runner structure.
crates/tests/Cargo.toml	Adds tests-core dependency.
crates/tests-core/src/lib.rs	New shared crate for test-case models + JSON loading helpers.
crates/tests-core/Cargo.toml	New crate manifest for tests-core.
crates/manual/src/main.rs	New CLI to run a selected flow/input and print the execution result.
crates/manual/Cargo.toml	New crate manifest for manual.
crates/core/src/context/executor.rs	Tweaks remote-node detection when definition_source is empty.
Cargo.toml	Adds manual and tests-core to the workspace and workspace dependencies.
Cargo.lock	Locks new dependencies introduced by the added crates (e.g., clap).

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