chore: add a codecov script

Author: lpm0073

.env-example

@@ -11,3 +11,4 @@ MYSQL_PASSWORD=smarter_test_user
 MYSQL_DATABASE=smarter_test_db
 MYSQL_CHARSET=utf8mb4
 PYTHONPATH=./venv:./
+CODECOV_TOKEN=ADD-YOUR-CODECOV_TOKEN-HERE

scripts/codecov.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# Always resolve the path to coverage.xml relative to the repo root
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(dirname "$SCRIPT_DIR")"
+COVERAGE_FILE="$REPO_ROOT/coverage.xml"
+BRANCH="main"
+CODECOV_TOKEN="${CODECOV_TOKEN}"
+
+if [[ -z "$CODECOV_TOKEN" ]]; then
+  echo "Error: CODECOV_TOKEN environment variable not set."
+  exit 1
+fi
+
+if [[ ! -f "$COVERAGE_FILE" ]]; then
+  echo "Error: $COVERAGE_FILE not found."
+  exit 1
+fi
+
+COMMIT_SHA=$(git -C "$REPO_ROOT" rev-parse origin/main)
+
+curl -X POST -F "file=@${COVERAGE_FILE}" \
+  "https://codecov.io/upload/v4?token=${CODECOV_TOKEN}&branch=${BRANCH}&commit=${COMMIT_SHA}"