feat: Initial implementation of FitTrack Report Generator

This commit introduces the initial version of the FitTrack Report Generator, a FastAPI application for analyzing workout files.

Key features include:
- Parsing of FIT, TCX, and GPX workout files.
- Analysis of power, heart rate, speed, and elevation data.
- Generation of summary reports and charts.
- REST API for single and batch workout analysis.

The project structure has been set up with a `src` directory for core logic, an `api` directory for the FastAPI application, and a `tests` directory for unit, integration, and contract tests.

The development workflow is configured to use Docker and modern Python tooling.

examples/GarminSync/entrypoint.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Always run database migrations with retries
+echo "$(date) - Starting database migrations..."
+echo "ALEMBIC_CONFIG: ${ALEMBIC_CONFIG:-/app/migrations/alembic.ini}"
+echo "ALEMBIC_SCRIPT_LOCATION: ${ALEMBIC_SCRIPT_LOCATION:-/app/migrations/versions}"
+
+max_retries=5
+retry_count=0
+migration_status=1
+
+export ALEMBIC_CONFIG=${ALEMBIC_CONFIG:-/app/migrations/alembic.ini}
+export ALEMBIC_SCRIPT_LOCATION=${ALEMBIC_SCRIPT_LOCATION:-/app/migrations/versions}
+
+while [ $retry_count -lt $max_retries ] && [ $migration_status -ne 0 ]; do
+    echo "Attempt $((retry_count+1))/$max_retries: Running migrations..."
+    start_time=$(date +%s)
+    alembic upgrade head
+    migration_status=$?
+    end_time=$(date +%s)
+    duration=$((end_time - start_time))
+    
+    if [ $migration_status -ne 0 ]; then
+        echo "$(date) - Migration attempt failed after ${duration} seconds! Retrying..."
+        retry_count=$((retry_count+1))
+        sleep 2
+    else
+        echo "$(date) - Migrations completed successfully in ${duration} seconds"
+    fi
+done
+
+if [ $migration_status -ne 0 ]; then
+    echo "$(date) - Migration failed after $max_retries attempts!" >&2
+    exit 1
+fi
+
+# Start the application
+echo "$(date) - Starting application..."
+exec python -m garminsync.cli daemon --start --port 8888