[feature] add support for receiving federated status edits (#3597)

* add support for extracting Updated field from Statusable implementers

* add support for status edits in the database, and update status dereferencer to handle them

* remove unused AdditionalInfo{}.CreatedAt

* remove unused AdditionalEmojiInfo{}.CreatedAt

* update new mention creation to use status.UpdatedAt

* remove mention.UpdatedAt, fixes related to NewULIDFromTime() change

* add migration to remove Mention{}.UpdatedAt field

* add migration to add the StatusEdit{} table

* start adding tests, add delete function for status edits

* add more of status edit migrations, fill in more of the necessary edit delete functionality

* remove unused function

* allow generating gotosocial compatible ulid via CLI with `go run ./cmd/gen-ulid`

* add StatusEdit{} test models

* fix new statusedits sql

* use model instead of table name

* actually remove the Mention.UpdatedAt field...

* fix tests now new models are added, add more status edit DB tests

* fix panic wording

* add test for deleting status edits

* don't automatically set `updated_at` field on updated statuses

* flesh out more of the dereferencer status edit tests, ensure updated at field set on outgoing AS statuses

* remove media_attachments.updated_at column

* fix up more tests, further complete the dereferencer status edit tests

* update more status serialization tests not expecting 'updated' AS property

* gah!! json serialization tests!!

* undo some gtscontext wrapping changes

* more serialization test fixing 🥲

* more test fixing, ensure the edit.status_id field is actually set 🤦

* fix status edit test

* grrr linter

* add edited_at field to apimodel status

* remove the choice of paging on the timeline public filtered test (otherwise it needs updating every time you add statuses ...)

* ensure that status.updated_at always fits chronologically

* fix more serialization tests ...

* add more code comments

* fix envparsing

* update swagger file

* properly handle media description changes during status edits

* slight formatting tweak

* code comment

internal/media/types.go

@@ -20,7 +20,6 @@ package media
 import (
 	"context"
 	"io"
-	"time"
 )
 
 type Size string
@@ -44,10 +43,6 @@ const (
 // should be added to attachment when processing a piece of media.
 type AdditionalMediaInfo struct {
 
-	// Time that this media was
-	// created; defaults to time.Now().
-	CreatedAt *time.Time
-
 	// ID of the status to which this
 	// media is attached; defaults to "".
 	StatusID *string
@@ -93,10 +88,6 @@ type AdditionalEmojiInfo struct {
 	// this remote emoji.
 	URI *string
 
-	// Time that this emoji was
-	// created; defaults to time.Now().
-	CreatedAt *time.Time
-
 	// Domain the emoji originated from. Blank
 	// for this instance's domain. Defaults to "".
 	Domain *string