DB: In TAL and TAR, rename 'offer' to 'open'

That's because with the Create flow added, the activity that reports a ticket
can be either Create or Offer, maybe later Announce too.

The old TAL unique name mentioned in the migration has what may look like a
typo, "Locale" instead of "Local". That's because I made a typo in migration
115, and now needed to specify the typoed name I used then. I verified in dev
DB and on dev.angeley.es DB that the typo is reflected in the PostgreSQL
database side and fixed by the new migrations.

src/Vervis/API.hs

@@ -877,7 +877,7 @@ offerTicketC shrUser summary audience offer@(Offer ticket uTarget) = runExceptT
                 insert_ TicketAuthorLocal
                     { ticketAuthorLocalTicket = ltid
                     , ticketAuthorLocalAuthor = pidAuthor
-                    , ticketAuthorLocalOffer  = obiid
+                    , ticketAuthorLocalOpen   = obiid
                     }
                 --insertMany_ $ map (TicketDependency tid) tidsDeps
                 -- insert_ $ Follow pidAuthor fsid False True

src/Vervis/Federation/Ticket.hs

@@ -286,7 +286,7 @@ projectOfferTicketF
                 insert_ TicketAuthorRemote
                     { ticketAuthorRemoteTicket = tplid
                     , ticketAuthorRemoteAuthor = raidAuthor
-                    , ticketAuthorRemoteOffer  = ractid
+                    , ticketAuthorRemoteOpen   = ractid
                     }
                 docAccept <- insertAccept ra luOffer ltid obiidAccept
                 -- insertMany_ $ map (TicketDependency tid) deps

src/Vervis/Handler/Client.hs

@@ -694,7 +694,7 @@ postTicketsR shr prj = do
             ExceptT $ offerTicket shrAuthor (TextHtml title) (TextPandocMarkdown desc) shr prj
         obiid <- ExceptT $ offerTicketC shrAuthor summary audience offer
         ExceptT $ runDB $ do
-            mtal <- getValBy $ UniqueTicketAuthorLocalOffer obiid
+            mtal <- getValBy $ UniqueTicketAuthorLocalOpen obiid
             return $
                 case mtal of
                     Nothing ->

src/Vervis/Migration.hs

@@ -1407,6 +1407,20 @@ changes hLocal ctx =
         "UniqueTicketAuthorRemote"
       -- 210
     , renameField "TicketAuthorRemote" "ticketNew" "ticket"
+      -- 211
+    , renameField "TicketAuthorLocal" "offer" "open"
+      -- 212
+    , renameUnique
+        "TicketAuthorLocal"
+        "UniqueTicketAuthorLocaleOffer"
+        "UniqueTicketAuthorLocalOpen"
+      -- 213
+    , renameField "TicketAuthorRemote" "offer" "open"
+      -- 214
+    , renameUnique
+        "TicketAuthorRemote"
+        "UniqueTicketAuthorRemoteOffer"
+        "UniqueTicketAuthorRemoteOpen"
     ]
 
 migrateDB