[chore] reformat GetAccount() functionality, support updating accounts based on last_fetch (#1411)

* reformat GetAccount() functionality, and add UpdateAccount() function.

* use fetched_at instead of last_webfingered_at

* catch local "not found" errors. small formatting / error string changes

* remove now unused error type

* return nil when wrapping nil error

* update expected error messages

* return correct url for foss satan webfinger

* add AP model for Some_User

* normalize local domain

* return notretrievable where appropriate

* expose NewErrNotRetrievable

* ensure webfinger for new accounts searched by uri

* update local account short circuit

* allow enrich to fail for already-known accounts

* remove unused LastWebfingeredAt

* expose test maps on mock http client

* update Update test

* reformat GetAccount() functionality, and add UpdateAccount() function.

* use fetched_at instead of last_webfingered_at

* catch local "not found" errors. small formatting / error string changes

* remove nil error checks (we shouldn't be passing nil errors to newError() initializers)

* remove mutex unlock on transport init fail (it hasn't yet been locked!)

* woops add back the error wrapping to use ErrNotRetrievable

* caches were never being started... 🙈

---------

Signed-off-by: kim <grufwub@gmail.com>
Co-authored-by: tsmethurst <tobi.smethurst@protonmail.com>

internal/processing/account/get.go

@@ -26,7 +26,6 @@ import (
 
 	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
-	"github.com/superseriousbusiness/gotosocial/internal/federation/dereferencing"
 	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 	"github.com/superseriousbusiness/gotosocial/internal/transport"
@@ -94,13 +93,9 @@ func (p *processor) getAccountFor(ctx context.Context, requestingAccount *gtsmod
 			return nil, gtserror.NewErrorInternalError(fmt.Errorf("error parsing url %s: %s", targetAccount.URI, err))
 		}
 
-		a, err := p.federator.GetAccount(transport.WithFastfail(ctx), dereferencing.GetAccountParams{
-			RequestingUsername:    requestingAccount.Username,
-			RemoteAccountID:       targetAccountURI,
-			RemoteAccountHost:     targetAccount.Domain,
-			RemoteAccountUsername: targetAccount.Username,
-			Blocking:              true,
-		})
+		a, err := p.federator.GetAccountByURI(
+			transport.WithFastfail(ctx), requestingAccount.Username, targetAccountURI, true,
+		)
 		if err == nil {
 			targetAccount = a
 		}