fix(deps): update github.com/opencloud-eu/opencloud digest to a8fff7e

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/opencloud-eu/opencloud	require	digest	a843038 → a8fff7e

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Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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[renovate]

ℹ️ Artifact update notice

File name: backend/go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• 40 additional dependencies were updated

Details:

Package	Change
github.com/opencloud-eu/reva/v2	v2.42.6-0.20260311175421-d77bc89ffe35 -> v2.43.0
github.com/Azure/go-ntlmssp	v0.0.0-20221128193559-754e69321358 -> v0.1.0
github.com/ceph/go-ceph	v0.37.0 -> v0.38.0
github.com/coreos/go-oidc/v3	v3.17.0 -> v3.18.0
github.com/coreos/go-systemd/v22	v22.6.0 -> v22.7.0
github.com/go-git/go-billy/v5	v5.6.2 -> v5.8.0
github.com/go-git/go-git/v5	v5.16.5 -> v5.18.0
github.com/go-jose/go-jose/v4	v4.1.3 -> v4.1.4
github.com/go-ldap/ldap/v3	v3.4.12 -> v3.4.13
github.com/go-playground/validator/v10	v10.30.1 -> v10.30.2
github.com/klauspost/compress	v1.18.3 -> v1.18.5
github.com/mattn/go-sqlite3	v1.14.34 -> v1.14.37
github.com/nats-io/nats.go	v1.49.0 -> v1.51.0
github.com/nats-io/nkeys	v0.4.12 -> v0.4.15
github.com/opencloud-eu/libre-graph-api-go	v1.0.8-0.20260204102724-10bcda1b3068 -> v1.0.8-0.20260310090739-853d972b282d
github.com/rs/zerolog	v1.34.0 -> v1.35.0
github.com/samber/lo	v1.52.0 -> v1.53.0
github.com/samber/slog-common	v0.20.0 -> v0.21.0
github.com/samber/slog-zerolog/v2	v2.9.1 -> v2.9.2
github.com/tus/tusd/v2	v2.8.0 -> v2.9.2
go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc	v0.65.0 -> v0.68.0
go.opentelemetry.io/otel	v1.42.0 -> v1.43.0
go.opentelemetry.io/otel/exporters/otlp/otlptrace	v1.41.0 -> v1.43.0
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc	v1.41.0 -> v1.43.0
go.opentelemetry.io/otel/metric	v1.42.0 -> v1.43.0
go.opentelemetry.io/otel/sdk	v1.41.0 -> v1.43.0
go.opentelemetry.io/otel/trace	v1.42.0 -> v1.43.0
go.opentelemetry.io/proto/otlp	v1.9.0 -> v1.10.0
golang.org/x/crypto	v0.48.0 -> v0.49.0
golang.org/x/image	v0.36.0 -> v0.38.0
golang.org/x/mod	v0.32.0 -> v0.33.0
golang.org/x/net	v0.51.0 -> v0.52.0
golang.org/x/oauth2	v0.35.0 -> v0.36.0
golang.org/x/sys	v0.41.0 -> v0.42.0
golang.org/x/term	v0.40.0 -> v0.41.0
golang.org/x/text	v0.34.0 -> v0.35.0
golang.org/x/tools	v0.41.0 -> v0.42.0
google.golang.org/genproto	v0.0.0-20250303144028-a0af3efb3deb -> v0.0.0-20260128011058-8636f8732409
google.golang.org/genproto/googleapis/api	v0.0.0-20260209200024-4cfbd4190f57 -> v0.0.0-20260401024825-9d38bb4040a9
google.golang.org/genproto/googleapis/rpc	v0.0.0-20260209200024-4cfbd4190f57 -> v0.0.0-20260406210006-6f92a3bedf2d