feat: adopt EMBP architecture and Docker-based development workflow

- Implement Explicit Module Boundary Pattern (EMBP) across crate
  - Add `domain.rs` and `lib.rs` gateway modules
  - Refactor imports for consistent boundaries and encapsulation
- Containerize development and CI workflows using Docker Compose
  - Add `scripts/build.sh` for unified lint/format/test pipeline
  - Pin Rust toolchain to 1.85 for reproducible builds
  - Mount volumes for hot-reload development
  - Replace curl healthchecks with netcat port checks
- Run full integration tests using containerized cargo-lambda
  - Fix flakiness with order-agnostic assertions
  - Ensure full test parity between local dev and CI
- Update CI workflows to match container-based dev setup
- Improve documentation (README, CHANGELOG)

BREAKING CHANGE: Local development now requires Docker; native Rust-only workflows are no longer supported.

Author: JohnBasrai

.github/workflows/ci.yml

@@ -7,40 +7,19 @@ on:
     branches: [ main ]
 
 env:
-  CARGO_TERM_COLOR: always
+  CARGO_TERM_COLOR: never
 
 jobs:
   test:
     name: Test
     runs-on: ubuntu-latest
 
+    env:
+      COMPOSE_BAKE: true
+
     steps:
     - name: Checkout code
       uses: actions/checkout@v4
 
-    - name: Install Rust
-      uses: dtolnay/rust-toolchain@stable
-      with:
-        components: rustfmt
-
-    - name: Cache Cargo dependencies
-      uses: actions/cache@v4
-      with:
-        path: |
-          ~/.cargo/bin/
-          ~/.cargo/registry/index/
-          ~/.cargo/registry/cache/
-          ~/.cargo/git/db/
-          target/
-        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-cargo-
-
-    - name: Check formatting
-      run: cargo fmt --check
-
-    - name: Build release
-      run: cargo build --release --quiet
-
-    - name: Run tests
-      run: cargo test --release --quiet
+    - name: Run build and test script
+      run: ./scripts/build.sh

CHANGELOG.md

@@ -8,7 +8,41 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and
 
 ## [Unreleased]
 
-- Awaiting license and attribution confirmation from the original author
+## [0.2.0] – 2025-06-28
+
+### Added
+
+* **EMBP Architecture**: Adopted Explicit Module Boundary Pattern for clean crate structure
+
+  * Created `mod.rs` gateways across all key modules (`domain/`, `repository/`, etc.)
+  * Improved encapsulation, import hygiene, and module boundaries
+* **Docker-Based Development Workflow**:
+
+  * Added Docker Compose setup with Postgres and Redis
+  * Hot-reload development via volume mounts
+  * Introduced `scripts/build.sh` for unified format/lint/test/build pipeline
+* **Standardized CI Pipeline**:
+
+  * GitHub Actions CI mirrors local container-based workflow
+  * Includes clippy, rustfmt, unit tests, and integration tests
+  * Added containerized end-to-end tests using `cargo lambda`
+* **Toolchain Pinning**: Rust version pinned to 1.85 for consistency
+
+### Changed
+
+* CI and local development now fully containerized
+* Replaced fragile curl healthchecks with robust netcat-based port checks
+
+### Fixed
+
+* Integration test flakiness due to HashMap ordering:
+
+  * Added order-agnostic assertions
+  * Ensured reliable deduplication across input variants
+
+### ⚠️ Breaking Changes
+
+* Local development now **requires Docker**; native Rust-only workflow is no longer supported
 
 ---
 

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "aws-lambda-action-filter"
-version = "0.1.1"
+version = "0.2.0"
 edition = "2021"
 
 [dependencies]
@@ -11,5 +11,4 @@ serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
 tracing = "0.1"
-tracing-subscriber = { version = "0.3", features = ["fmt", "env-filter"] }
-
+tracing-subscriber = { version = "0.3", features = ["fmt", "env-filter"] }

Cargo.toml

@@ -0,0 +1,28 @@
+FROM rust:1.85-slim
+
+# Install system deps for building Rust packages and running cargo-lambda
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    libssl-dev \
+    pkg-config \
+    curl \
+    ca-certificates \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# Add cargo bin path explicitly
+ENV PATH="/usr/local/cargo/bin:${PATH}"
+
+# Install rustfmt component
+RUN rustup component add rustfmt
+
+# Install cargo-lambda
+RUN cargo install cargo-lambda --version 1.8.5 --locked --quiet
+
+# Default user
+RUN useradd -m dev
+WORKDIR /app
+
+USER root
+
+# Entry point overriden by docker-compose.yml
+CMD [ "bash" ]