Add GitHub Actions CI with format check, build, and test steps

.github/workflows/ci.yml

@@ -0,0 +1,46 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+
+    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

CHANGELOG.md

@@ -21,8 +21,10 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and
   - Maintains identical behavior with improved structure and testability.
 
 ### Added
+- Added GitHub Actions CI with format check, build, and test steps
 - Added `process_actions` function to encapsulate business logic
 - Wrote unit tests using `anyhow::Result` and `ensure` for panic-free testing
+- Added `tracing` and `tracing-subscriber` crates for structured logging.
 - Added `parse_date` utility to safely parse ISO-8601 timestamps
 - Added README summary and improvements section