Revert to Langfuse v2 (remove ClickHouse requirement)

Dockerfile

@@ -1,4 +1,4 @@
-FROM langfuse/langfuse:3
+FROM langfuse/langfuse:2
 
 USER root
 

docker-entrypoint-wrapper.sh

@@ -1,31 +1,5 @@
 #!/bin/sh
 
-# Check if CLICKHOUSE_URL is set
-if [ -z "$CLICKHOUSE_URL" ]; then
-    echo "ERROR: CLICKHOUSE_URL is required for Langfuse v3"
-    echo "Please set CLICKHOUSE_URL secret in HF Space settings"
-    echo "Get free ClickHouse at: https://clickhouse.cloud"
-    exit 1
-fi
-
-echo "=== USING EXTERNAL CLICKHOUSE ==="
-
-# If CLICKHOUSE_USER and CLICKHOUSE_PASSWORD are set separately, build the full URL
-if [ -n "$CLICKHOUSE_USER" ] && [ -n "$CLICKHOUSE_PASSWORD" ]; then
-    # Extract host and port from CLICKHOUSE_URL
-    CLICKHOUSE_HOST=$(echo "$CLICKHOUSE_URL" | sed -e 's|^[^/]*//||' -e 's|/.*$||' -e 's|:8443$||' -e 's|:9440$||')
-    
-    # Build URL with clickhouse:// protocol for migrations (use secure protocol)
-    export CLICKHOUSE_URL="clickhouse://${CLICKHOUSE_USER}:${CLICKHOUSE_PASSWORD}@${CLICKHOUSE_HOST}:9440/default?secure=true"
-    export CLICKHOUSE_MIGRATION_URL="$CLICKHOUSE_URL"
-    echo "ClickHouse URL constructed: clickhouse://${CLICKHOUSE_USER}:****@${CLICKHOUSE_HOST}:9440/default?secure=true"
-else
-    echo "ClickHouse URL configured directly: ${CLICKHOUSE_URL%%\?*}"
-    if [ -z "$CLICKHOUSE_MIGRATION_URL" ]; then
-        export CLICKHOUSE_MIGRATION_URL="$CLICKHOUSE_URL"
-    fi
-fi
-
 # Check if using external database (for persistence)
 if [ -n "$EXTERNAL_DATABASE_URL" ]; then
     echo "=== USING EXTERNAL DATABASE (PERSISTENT) ==="