feat: add random data generator pipe for testing

tinybird/copies/random_data_generator.pipe

@@ -0,0 +1,18 @@
+DESCRIPTION >
+    Copy pipe that generates random analytics events data with configurable row limit and date range parameters for testing purposes
+
+NODE generate_random_events
+SQL >
+    %
+    SELECT
+        now() - interval rand() % ({{ Int32(days_back, 7, description="Number of days back to generate timestamps for") }} * 86400) second as timestamp,
+        concat('session_', toString(rand() % 10000)) as session_id,
+        arrayElement(['page_hit', 'web_vital', 'click', 'scroll'], (rand() % 4) + 1) as action,
+        arrayElement(['1.0', '1.1', '2.0'], (rand() % 3) + 1) as version,
+        concat('{"href":"https://example.com/', arrayElement(['home', 'about', 'contact', 'products', 'blog'], (rand() % 5) + 1), '","domain":"example.com","pathname":"/', arrayElement(['home', 'about', 'contact', 'products', 'blog'], (rand() % 5) + 1), '","user-agent":"Mozilla/5.0 (compatible; test)"}') as payload,
+        concat('tenant_', toString((rand() % 5) + 1)) as tenant_id,
+        arrayElement(['example.com', 'test.com', 'demo.org'], (rand() % 3) + 1) as domain
+    FROM numbers({{ Int32(row_limit, 1000, description="Number of random rows to generate") }})
+
+TYPE COPY
+TARGET_DATASOURCE analytics_events