feat(core): extracted the scenario runner

.cargo/audit.toml

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+# cargo-audit reads Cargo.lock and flags every advisory in it, even for a
+# crate behind a disabled feature that never compiles. deny.toml explains
+# which file an ignore belongs in.
+#
+# cargo-audit takes plain IDs, so write each ignore's reason in a comment
+# above it.
+
+[advisories]
+ignore = []

.github/dependabot.yml

@@ -0,0 +1,28 @@
+version: 2
+updates:
+  - package-ecosystem: cargo
+    directory: /
+    schedule:
+      interval: monthly
+    open-pull-requests-limit: 10
+    commit-message:
+      prefix: "chore(deps)"
+    groups:
+      cargo-minor-and-patch:
+        update-types:
+          - minor
+          - patch
+
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly
+    open-pull-requests-limit: 5
+    commit-message:
+      prefix: "chore(ci)"
+    groups:
+      actions-all:
+        update-types:
+          - major
+          - minor
+          - patch

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  workflow_dispatch:
+
+# Only PR runs are cancelled, so a push to main always finishes.
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
+env:
+  CARGO_TERM_COLOR: always
+  RUSTFLAGS: -D warnings
+
+jobs:
+  cargo:
+    name: Format, Clippy & Tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - name: Install Rust
+        run: |
+          rustup toolchain install stable --profile minimal --component rustfmt,clippy
+          rustup default stable
+      - uses: Swatinem/rust-cache@v2
+      - name: cargo fmt
+        run: cargo fmt -- --check
+      - name: cargo clippy
+        run: cargo clippy --locked --all-targets --all-features -- -D warnings
+      # Also runs the README example, which is the crate-level doctest.
+      - name: cargo test
+        run: cargo test --locked --all-features
+      # Fails on a broken intra-doc link, which rustc alone does not check.
+      - name: cargo doc
+        run: cargo doc --locked --no-deps
+        env:
+          RUSTDOCFLAGS: -D warnings
+
+  cargo-audit:
+    name: Cargo Audit
+    runs-on: ubuntu-latest
+    permissions:
+      checks: write
+      contents: read
+    steps:
+      - uses: actions/checkout@v7
+      - uses: rustsec/audit-check@v2.0.0
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+  cargo-deny:
+    name: Cargo Deny
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - uses: EmbarkStudios/cargo-deny-action@v2
+        with:
+          command: check advisories
+
+  cargo-machete:
+    name: Cargo Machete
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - uses: bnjbvr/cargo-machete@v0.9.2

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "penelope"
+version = "0.1.0"
+edition = "2024"
+description = "A Given/When/Then scenario runner for eventually consistent systems"
+license = "Apache-2.0"
+repository = "https://github.com/DLC-link/penelope"
+readme = "README.md"
+
+[dependencies]
+anyhow = { version = "1.0.98" }
+tokio = { version = "1.48.0", features = ["time"] }
+tracing = { version = "0.1" }
+
+[dev-dependencies]
+tokio = { version = "1.48.0", features = ["macros", "rt-multi-thread", "time"] }
+
+[lints.rust]
+missing_docs = "warn"
+unsafe_code = "forbid"