PostgreSQL flexible server blocks all Azure service access

# Update the existing rule to not use 0.0.0.0 (disables "Allow Azure services")
resource "azurerm_postgresql_flexible_server_firewall_rule" "<example_resource_name>" {
  name             = "<example_rule_name>"
  server_id        = "<example_resource_id>"
  start_ip_address = "<START_IP>" # critical: not 0.0.0.0
  end_ip_address   = "<END_IP>"   # critical: not 0.0.0.0
}

// Update the existing firewall rule that allowed Azure services (0.0.0.0) to a specific IP/range
resource fwRule 'Microsoft.DBforPostgreSQL/flexibleServers/firewallRules@2023-03-01-preview' = {
  name: '<example_server_name>/<example_rule_name>'
  properties: {
    startIpAddress: '<START_IP>' // critical: not 0.0.0.0; disables "Allow Azure services"
    endIpAddress: '<END_IP>'     // critical: not 0.0.0.0
  }
}