Only set json_type_escape_dots_in_keys if CH version > 25.8 (#3611)

### Why
Setting introduced in #3606 only
exists in ClickHouse versions 25.8 and above according to
https://clickhouse.com/docs/sql-reference/data-types/newjson#handling-json-keys-with-dots.

Lower versions of ClickHouse fail in initial load with this error:
```
Setting json_type_escape_dots_in_keys is neither a builtin setting nor started with the prefix 'SQL_' registered for user-defined settings
```

### What
This PR only sets this setting if CH version is > 25.8

Author: Amogh-Bharadwaj

flow/connectors/clickhouse/avro_sync.go

@@ -286,7 +286,7 @@ func (s *ClickHouseAvroSyncMethod) pushS3DataToClickHouse(
 		"throw_on_max_partitions_per_insert_block": "0",
 		"type_json_skip_duplicated_paths":          "1",
 	}
-	if config.Version >= shared.InternalVersion_JsonEscapeDotsInKeys {
+	if config.Version >= shared.InternalVersion_JsonEscapeDotsInKeys && ShouldUseJSONEscapeDotsInKeys(ctx, s.chVersion) {
 		settings["json_type_escape_dots_in_keys"] = "1"
 	}
 

flow/connectors/clickhouse/normalize_query.go

@@ -316,7 +316,7 @@ func (t *NormalizeQueryGenerator) BuildQuery(ctx context.Context) (string, error
 	if t.cluster {
 		settings["parallel_distributed_insert_select"] = "0"
 	}
-	if t.version >= shared.InternalVersion_JsonEscapeDotsInKeys {
+	if t.version >= shared.InternalVersion_JsonEscapeDotsInKeys && ShouldUseJSONEscapeDotsInKeys(ctx, t.chVersion) {
 		settings["json_type_escape_dots_in_keys"] = "1"
 	}
 	settingsStr := buildSettingsStr(settings)

flow/connectors/clickhouse/validate.go

@@ -7,6 +7,8 @@ import (
 	"slices"
 	"strings"
 
+	chproto "github.com/ClickHouse/clickhouse-go/v2/lib/proto"
+
 	"github.com/PeerDB-io/peerdb/flow/generated/protos"
 	"github.com/PeerDB-io/peerdb/flow/internal"
 	chvalidate "github.com/PeerDB-io/peerdb/flow/pkg/clickhouse"
@@ -85,3 +87,12 @@ func (c *ClickHouseConnector) ValidateMirrorDestination(
 	}
 	return nil
 }
+
+func ShouldUseJSONEscapeDotsInKeys(ctx context.Context, chVersion *chproto.Version) bool {
+	if chVersion == nil {
+		return false
+	}
+	// https://clickhouse.com/docs/operations/settings/formats#json_type_escape_dots_in_keys
+	// Available in ClickHouse 25.8 and later
+	return chproto.CheckMinVersion(chproto.Version{Major: 25, Minor: 8, Patch: 0}, *chVersion)
+}