feat(infra): implement batch transformation layer and comprehensive documentation

Add batch ETL pipeline with ODS→DDS→DM transformation jobs and scripts.
Create DDL infrastructure with automated database schema application.
Update Makefile with transform target for executing batch processes.
Rewrite README with complete Russian documentation including architecture
diagrams, quick start guide, and data flow visualization.

scripts/apply_clickhouse_ddl.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Apply ClickHouse DDL files in order
+# Usage: make ddl
+#        or: bash scripts/apply_clickhouse_ddl.sh
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+DDL_DIR="${SCRIPT_DIR}/../ddl"
+
+COMPOSE_BIN="${COMPOSE_BIN:-docker compose}"
+CLICKHOUSE_SERVICE="${CLICKHOUSE_SERVICE:-clickhouse}"
+CLICKHOUSE_DB="${CLICKHOUSE_DB:-default}"
+CLICKHOUSE_USER="${CLICKHOUSE_USER:-default}"
+CLICKHOUSE_PASSWORD="${CLICKHOUSE_PASSWORD:-123456}"
+
+echo "Applying ClickHouse DDL from ${DDL_DIR}..."
+
+# Check if clickhouse service is running
+if ! ${COMPOSE_BIN} ps | grep -q "${CLICKHOUSE_SERVICE}"; then
+    echo "Error: ClickHouse service '${CLICKHOUSE_SERVICE}' is not running."
+    echo "Run 'make up' first to start the services."
+    exit 1
+fi
+
+# Apply DDL files in order (00 -> 10 -> 20 -> 30 -> 40)
+for sql_file in "${DDL_DIR}"/*.sql; do
+    if [[ -f "$sql_file" ]]; then
+        echo "Applying: $(basename "$sql_file")"
+        ${COMPOSE_BIN} exec -T "${CLICKHOUSE_SERVICE}" clickhouse-client \
+            --user="${CLICKHOUSE_USER}" \
+            --password="${CLICKHOUSE_PASSWORD}" \
+            --database="${CLICKHOUSE_DB}" \
+            --multiquery \
+            < "$sql_file"
+        echo "  ✓ OK"
+    fi
+done
+
+echo "DDL applied successfully."