Sentry Issue: [POSTHOG-2MC](https://sentry.io/organizations/posthog/issues/2325605024/?referrer=github_integration)

Looks like we can't process autocapture elements containing elements that have too large definitions, because the relevant field has a limit of 400 chars in Postgres (while having NO limit in ClickHouse, as CH varchars are unlimited). This affects all such events in Postgres PostHog and webhooks in ClickHouse PostHog.
posthog/models/element.py
from django.contrib.postgres.fields import ArrayField, JSONField
from django.db import models
class Element(models.Model):
    USEFUL_ELEMENTS = ["a", "button", "input", "select", "textarea", "label"]
    text: models.CharField = models.CharField(max_length=400, null=True, blank=True)
    tag_name: models.CharField = models.CharField(max_length=400, null=True, blank=True)
    href: models.CharField = models.CharField(max_length=2048, null=True, blank=True)
    attr_id: models.CharField = models.CharField(max_length=400, null=True, blank=True)
    attr_class = ArrayField(models.CharField(max_length=200, blank=True), null=True, blank=True)
    nth_child: models.IntegerField = models.IntegerField(null=True, blank=True)
    nth_of_type: models.IntegerField = models.IntegerField(null=True, blank=True)
    attributes: JSONField = JSONField(default=dict)
    event: models.ForeignKey = models.ForeignKey("Event", on_delete=models.CASCADE, null=True, blank=True)
    order: models.IntegerField = models.IntegerField(null=True, blank=True)
    group: models.ForeignKey = models.ForeignKey("ElementGroup", on_delete=models.CASCADE, null=True, blank=True)