core: group member/owner keys for signing important messages (#6597)

* rfc: member keys

* update plan

* new encoding for message batches

* send new batch encoding in relay-based groups

* mvp launch plan

* update plan

* core: verify group member keys (#6669)

* core: verify group member keys

* refactor, process forwards

* refactor parsing

* refactor parsing 2

* refactor parser 3

* update rfc

* simplify

* simplify

* log tag

* refactor tag logging

* refactor withVerifiedSig

* simplify

* refactor more

* comment

* fix encoding

* fix sending as group for the new binary batch encoding

* unify types

* update api docs

* clean up

---------

Co-authored-by: Evgeny @ SimpleX Chat <259188159+evgeny-simplex@users.noreply.github.com>

* core: signing messages with member keys (#6675)

* core: signing messages with member keys (types)

* sign messages

* refactor batching

* better

* refactor

* remove unused Eq

---------

Co-authored-by: Evgeny @ SimpleX Chat <259188159+evgeny-simplex@users.noreply.github.com>

* core: forward signed messages as unchanged binary strings (#6678)

* core: forward signed messages as unchanged binary strings

* refactor

* consolidate types

* refactor VerifiedMsg

* refactor more

* undo rename

Co-authored-by: Evgeny <evgeny@poberezkin.com>

* update schema and plans

* add signed status to chat items and events

* test signed chat items

* unify parser

* PostgreSQL fix, remove unused fields, option to send inline files in the tests

* change inline files config

* revert inline config change

* use different characters in batch encoding, to avoid conflict with inline files

* fix test, api docs, query plans

---------

Co-authored-by: Evgeny @ SimpleX Chat <259188159+evgeny-simplex@users.noreply.github.com>

---------

Co-authored-by: spaced4ndy <8711996+spaced4ndy@users.noreply.github.com>
Co-authored-by: Evgeny @ SimpleX Chat <259188159+evgeny-simplex@users.noreply.github.com>

bots/api/TYPES.md

@@ -780,6 +780,7 @@ Group:
 - editable: bool
 - forwardedByMember: int64?
 - showGroupAsSender: bool
+- msgSigned: bool
 - createdAt: UTCTime
 - updatedAt: UTCTime
 
@@ -3125,6 +3126,9 @@ MemberProfileUpdated:
 NewMemberPendingReview:
 - type: "newMemberPendingReview"
 
+MsgBadSignature:
+- type: "msgBadSignature"
+
 
 ---