feat(api): read zone records without template + snapshot-to-template

LoadDomain requires a template, so a zone without one could never be
viewed or snapshotted. Adds a template-free path: store.LoadZone /
service.ZoneRef / DomainService.ZoneRecords read a zone's live records
straight from the provider (no diff, no template). GET
/domains/{did}/records exposes read-only viewing; POST
/domains/{did}/template-from-zone snapshots only managed record types
(NS/SOA excluded) into a new template and auto-attaches it to the domain.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BwxdSt4reTm7Dj1oxRvpP3

internal/service/service.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/vasyakrg/dns-autoresolver/internal/crypto"
 	"github.com/vasyakrg/dns-autoresolver/internal/diff"
+	"github.com/vasyakrg/dns-autoresolver/internal/model"
 	"github.com/vasyakrg/dns-autoresolver/internal/provider"
 	"github.com/vasyakrg/dns-autoresolver/internal/provider/registry"
 	"github.com/vasyakrg/dns-autoresolver/internal/store/dto"
@@ -20,8 +21,17 @@ type DomainRef struct {
 	Template  dto.TemplateDoc
 }
 
+// ZoneRef is the provider-access subset of a domain, without a template —
+// enough to read a zone's live records.
+type ZoneRef struct {
+	ZoneID    string
+	Provider  string
+	SecretEnc string
+}
+
 type Loader interface {
 	LoadDomain(ctx context.Context, projectID, domainID uuid.UUID) (DomainRef, error)
+	LoadZone(ctx context.Context, projectID, domainID uuid.UUID) (ZoneRef, error)
 }
 
 type Recorder interface {
@@ -81,6 +91,25 @@ func (s *DomainService) Check(ctx context.Context, projectID, domainID uuid.UUID
 	return cs, nil
 }
 
+// ZoneRecords reads a zone's current records straight from the provider,
+// with no diff and no template required. Used for read-only zone viewing and
+// as the source for a snapshot template.
+func (s *DomainService) ZoneRecords(ctx context.Context, projectID, domainID uuid.UUID) ([]model.Record, error) {
+	ref, err := s.loader.LoadZone(ctx, projectID, domainID)
+	if err != nil {
+		return nil, err
+	}
+	p, err := s.reg.ByName(ref.Provider)
+	if err != nil {
+		return nil, err
+	}
+	secret, err := s.cipher.Decrypt(ref.SecretEnc)
+	if err != nil {
+		return nil, err
+	}
+	return p.GetRecords(ctx, provider.Credentials{Secret: string(secret)}, ref.ZoneID)
+}
+
 // Apply applies updates always (when ApplyUpdates) and prunes only when ApplyPrunes.
 func (s *DomainService) Apply(ctx context.Context, projectID, domainID uuid.UUID, req ApplyRequest) (diff.Changeset, error) {
 	p, creds, ref, cs, err := s.resolve(ctx, projectID, domainID)