instance method tagged

Add tags to events to supply additional context. Tags operate in a stack-oriented manner, so all events emitted within the block inherit the same set of tags. For example:

Rails.event.tagged("graphql") do
  Rails.event.notify("user.created", { id: 123 })
end

# Emits event:
# {
#    name: "user.created",
#    payload: { id: 123 },
#    tags: { graphql: true },
#    context: {},
#    timestamp: 1738964843208679035,
#    source_location: { filepath: "path/to/file.rb", lineno: 123, label: "UserService#create" }
#  }

Tags can be provided as arguments or as keyword arguments, and can be nested:

Rails.event.tagged("graphql") do
# Other code here...
  Rails.event.tagged(section: "admin") do
    Rails.event.notify("user.created", { id: 123 })
  end
end

# Emits event:
#  {
#    name: "user.created",
#    payload: { id: 123 },
#    tags: { section: "admin", graphql: true },
#    context: {},
#    timestamp: 1738964843208679035,
#    source_location: { filepath: "path/to/file.rb", lineno: 123, label: "UserService#create" }
#  }

The tagged API can also receive a tag object:

graphql_tag = GraphqlTag.new(operation_name: "user_created", operation_type: "mutation")
Rails.event.tagged(graphql_tag) do
  Rails.event.notify("user.created", { id: 123 })
end

# Emits event:
#  {
#    name: "user.created",
#    payload: { id: 123 },
#    tags: { "GraphqlTag": #<GraphqlTag:0x111> },
#    context: {},
#    timestamp: 1738964843208679035,
#    source_location: { filepath: "path/to/file.rb", lineno: 123, label: "UserService#create" }
#  }