chore: add license to file sink (risingwavelabs#18227)

e2e_test/sink/license.slt

@@ -7,6 +7,32 @@ ALTER SYSTEM SET license_key TO '';
 statement ok
 CREATE TABLE t (k INT);
 
+statement error
+CREATE SINK file_sink
+FROM
+  t
+WITH
+(
+  connector = 's3',
+  s3.region_name = 'us-east-1',
+  s3.bucket_name = 'test',
+  s3.path = '',
+  s3.file_type = 'parquet',
+  type = 'append-only',
+  force_append_only='true'
+) FORMAT PLAIN ENCODE PARQUET(force_append_only='true');
+----
+db error: ERROR: Failed to run the query
+
+Caused by these errors (recent errors listed first):
+  1: gRPC request to meta service failed: Internal error
+  2: failed to validate sink
+  3: Internal error
+  4: feature FileSink is only available for tier Paid and above, while the current tier is Free
+
+Hint: You may want to set a license key with `ALTER SYSTEM SET license_key = '...';` command.
+
+
 statement error
 CREATE SINK dynamodb_sink
 FROM
@@ -109,6 +135,22 @@ ALTER SYSTEM SET license_key TO DEFAULT;
 statement ok
 flush;
 
+statement ok
+CREATE SINK file_sink
+FROM
+  t
+WITH
+(
+  connector = 's3',
+  s3.region_name = 'us-east-1',
+  s3.bucket_name = 'test',
+  s3.path = '',
+  s3.file_type = 'parquet',
+  type = 'append-only',
+  force_append_only='true'
+) FORMAT PLAIN ENCODE PARQUET(force_append_only='true');
+
+
 statement error
 CREATE SINK dynamodb_sink
 FROM

src/connector/src/sink/file_sink/opendal_sink.rs

@@ -95,6 +95,9 @@ impl<S: OpendalSinkBackend> Sink for FileSink<S> {
     const SINK_NAME: &'static str = S::SINK_NAME;
 
     async fn validate(&self) -> Result<()> {
+        risingwave_common::license::Feature::FileSink
+            .check_available()
+            .map_err(|e| anyhow::anyhow!(e))?;
         if !self.is_append_only {
             return Err(SinkError::Config(anyhow!(
                 "File sink only supports append-only mode at present. \

src/license/src/feature.rs

@@ -57,6 +57,7 @@ macro_rules! for_all_features {
             { SqlServerCdcSource,   Paid,       "CDC source connector for Sql Server." },
             { CdcAutoSchemaChange,  Paid,       "Auto replicate upstream DDL to CDC Table." },
             { IcebergSinkWithGlue,  Paid,       "Delivering data to Iceberg with Glue catalog." },
+            { FileSink,             Paid,       "Delivering data to object storage."},
         }
     };
 }