feat: add booster eligibility role and logging functionality

- Added BOOSTER_ELIGIBILITY_ROLE_ID and LOG_LEVEL to .env.example and README.md
- Updated GitHub Actions workflow to include new environment variables
- Enhanced configuration loading to support booster eligibility role
- Implemented role checking logic in bot handlers and guild member updates
- Introduced logging using Winston for better traceability of actions
- Created tests for guild member update handling to ensure correct role removal
- Refactored DiscordRoleRepository to simplify role position resolution

.github/workflows/deploy.yml

@@ -55,11 +55,13 @@ jobs:
           DISCORD_GUILD_ID: ${{ secrets.DISCORD_GUILD_ID }}
           DATABASE_URL: ${{ secrets.DATABASE_URL }}
           BOOSTER_ROLE_ANCHOR_ROLE_ID: ${{ secrets.BOOSTER_ROLE_ANCHOR_ROLE_ID }}
+          BOOSTER_ELIGIBILITY_ROLE_ID: ${{ secrets.BOOSTER_ELIGIBILITY_ROLE_ID }}
+          LOG_LEVEL: ${{ secrets.LOG_LEVEL }}
         with:
           host: ${{ secrets.VPS_HOST }}
           username: ${{ secrets.VPS_USER }}
           key: ${{ secrets.VPS_SSH_KEY }}
-          envs: IMAGE_NAME,GHCR_USERNAME,GHCR_TOKEN,DISCORD_TOKEN,DISCORD_CLIENT_ID,DISCORD_GUILD_ID,DATABASE_URL,BOOSTER_ROLE_ANCHOR_ROLE_ID
+          envs: IMAGE_NAME,GHCR_USERNAME,GHCR_TOKEN,DISCORD_TOKEN,DISCORD_CLIENT_ID,DISCORD_GUILD_ID,DATABASE_URL,BOOSTER_ROLE_ANCHOR_ROLE_ID,BOOSTER_ELIGIBILITY_ROLE_ID,LOG_LEVEL
           script: |
             set -eu
             mkdir -p /opt/booster-role
@@ -71,6 +73,8 @@ jobs:
             DISCORD_GUILD_ID=${DISCORD_GUILD_ID}
             DATABASE_URL=${DATABASE_URL:?DATABASE_URL is required}
             BOOSTER_ROLE_ANCHOR_ROLE_ID=${BOOSTER_ROLE_ANCHOR_ROLE_ID}
+            BOOSTER_ELIGIBILITY_ROLE_ID=${BOOSTER_ELIGIBILITY_ROLE_ID:-1206431347925852162}
+            LOG_LEVEL=${LOG_LEVEL:-info}
             EOF
 
             cat > docker-compose.yml <<EOF