fix(tests): fix ClickHouse test context and regenerate AnalyzerV2 outputs

This commit fixes two issues:

1. ClickHouse end-to-end tests: Changed from managed-db context to a new
   clickhouse-specific context. The managed-db context only handles
   PostgreSQL, MySQL, and SQLite. ClickHouse tests now only run when
   a ClickHouse database is available.

2. AnalyzerV2 test outputs: The Experiment flag was not being passed to
   parseOpts in process.go and vet.go. This meant the AnalyzerV2 experiment
   was never actually active, even when tests configured SQLCEXPERIMENT.
   Now that the experiment is properly passed, the test expected outputs
   have been regenerated to match actual AnalyzerV2 behavior.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: claude

internal/endtoend/endtoend_test.go

@@ -113,7 +113,7 @@ func TestReplay(t *testing.T) {
 	// t.Parallel()
 	ctx := context.Background()
 
-	var mysqlURI, postgresURI string
+	var mysqlURI, postgresURI, clickhouseURI string
 
 	// First, check environment variables
 	if uri := os.Getenv("POSTGRESQL_SERVER_URI"); uri != "" {
@@ -122,6 +122,9 @@ func TestReplay(t *testing.T) {
 	if uri := os.Getenv("MYSQL_SERVER_URI"); uri != "" {
 		mysqlURI = uri
 	}
+	if uri := os.Getenv("CLICKHOUSE_SERVER_URI"); uri != "" {
+		clickhouseURI = uri
+	}
 
 	// Try Docker for any missing databases
 	if postgresURI == "" || mysqlURI == "" {
@@ -146,7 +149,7 @@ func TestReplay(t *testing.T) {
 	}
 
 	// Try native installation for any missing databases (Linux only)
-	if postgresURI == "" || mysqlURI == "" {
+	if postgresURI == "" || mysqlURI == "" || clickhouseURI == "" {
 		if err := native.Supported(); err == nil {
 			if postgresURI == "" {
 				host, err := native.StartPostgreSQLServer(ctx)
@@ -164,12 +167,21 @@ func TestReplay(t *testing.T) {
 					mysqlURI = host
 				}
 			}
+			if clickhouseURI == "" {
+				host, err := native.StartClickHouseServer(ctx)
+				if err != nil {
+					t.Logf("native clickhouse startup failed: %s", err)
+				} else {
+					clickhouseURI = host
+				}
+			}
 		}
 	}
 
 	// Log which databases are available
 	t.Logf("PostgreSQL available: %v (URI: %s)", postgresURI != "", postgresURI)
 	t.Logf("MySQL available: %v (URI: %s)", mysqlURI != "", mysqlURI)
+	t.Logf("ClickHouse available: %v (URI: %s)", clickhouseURI != "", clickhouseURI)
 
 	contexts := map[string]textContext{
 		"base": {
@@ -218,6 +230,22 @@ func TestReplay(t *testing.T) {
 				return postgresURI != "" || mysqlURI != ""
 			},
 		},
+		"clickhouse": {
+			Mutate: func(t *testing.T, path string) func(*config.Config) {
+				return func(c *config.Config) {
+					for i := range c.SQL {
+						if c.SQL[i].Engine == config.EngineClickHouse {
+							c.SQL[i].Database = &config.Database{
+								URI: clickhouseURI,
+							}
+						}
+					}
+				}
+			},
+			Enabled: func() bool {
+				return clickhouseURI != ""
+			},
+		},
 	}
 
 	for name, testctx := range contexts {