#5: F2 sub-project 2 - IMAP SEARCH, EXPUNGE, COPY, MOVE

Adds the second F2 sub-project on top of the merged IMAP core: full
SEARCH criteria matching (flags, dates, size, headers, body/text,
NOT/OR), EXPUNGE (soft-delete via expunged_at), COPY, and MOVE (RFC
6851, advertised via CapMove/CapUIDPlus). Verified end-to-end with a
real go-imap/v2 client against embedded Postgres.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

services/protocols/cmd/lambdamail-protocols/main.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"os"
 
+	"github.com/emersion/go-imap/v2"
 	"github.com/emersion/go-imap/v2/imapserver"
 	gosmtp "github.com/emersion/go-smtp"
 
@@ -83,12 +84,19 @@ func main() {
 	messageQuery := postgres.NewMessageQueryRepository(pool)
 	flagRepo := postgres.NewFlagRepository(pool)
 	blobReader := diskstorage.NewLocalDiskBlobReader(pool)
-	imapUseCase := usecase.NewImapSessionUseCase(authRepo, imapFolders, messageQuery, flagRepo, blobReader)
+	expungeRepo := postgres.NewExpungeRepository(pool)
+	copyRepo := postgres.NewCopyRepository(pool)
+	imapUseCase := usecase.NewImapSessionUseCase(authRepo, imapFolders, messageQuery, flagRepo, blobReader, expungeRepo, copyRepo)
 
 	imapServer := imapserver.New(&imapserver.Options{
 		NewSession: func(c *imapserver.Conn) (imapserver.Session, *imapserver.GreetingData, error) {
 			return imappresentation.NewSession(c, imapUseCase)
 		},
+		Caps: imap.CapSet{
+			imap.CapIMAP4rev1: {},
+			imap.CapMove:      {},
+			imap.CapUIDPlus:   {},
+		},
 		TLSConfig:    &tls.Config{GetCertificate: certProvider.GetCertificate, MinVersion: tls.VersionTLS12},
 		InsecureAuth: false,
 	})