fix(deps): update github.com/opencloud-eu/opencloud digest to e0bfca4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/opencloud-eu/opencloud	require	digest	a843038 → e0bfca4

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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):

• 32 additional dependencies were updated
• The go directive was updated for compatibility reasons

Details:

Package	Change
go	1.25.8 -> 1.25.9
github.com/opencloud-eu/reva/v2	v2.49.0 -> v2.50.0
google.golang.org/grpc	v1.83.0 -> v1.83.2
github.com/KimMachineGun/automemlimit	v0.7.5 -> v1.0.0
github.com/beevik/etree	v1.7.0 -> v1.7.1
github.com/davidbyttow/govips/v2	v2.17.0 -> v2.18.0
github.com/felixge/httpsnoop	v1.0.4 -> v1.1.0
github.com/gabriel-vasile/mimetype	v1.4.13 -> v1.4.15
github.com/go-openapi/jsonpointer	v0.22.5 -> v1.0.0
github.com/goccy/go-yaml	v1.18.0 -> v1.19.2
github.com/gookit/config/v2	v2.2.7 -> v2.2.9
github.com/gookit/goutil	v0.7.1 -> v0.8.0
github.com/grpc-ecosystem/grpc-gateway/v2	v2.29.0 -> v2.30.0
github.com/klauspost/compress	v1.19.1 -> v1.19.2
github.com/kovidgoyal/imaging	v1.8.20 -> v1.8.23
github.com/leonelquinteros/gotext	v1.7.2 -> v1.7.3-0.20260422134830-b012b4ccae69
github.com/nats-io/nats.go	v1.52.0 -> v1.53.1
github.com/opencloud-eu/libre-graph-api-go	v1.0.8-0.20260204102724-10bcda1b3068 -> v1.0.8-0.20260902170011-45af3945a067
github.com/prometheus/client_model	v0.6.2 -> v0.6.3
github.com/shamaton/msgpack/v2	v2.4.1 -> v2.4.2
github.com/sirupsen/logrus	v1.9.4 -> v1.10.2
go.opentelemetry.io/otel	v1.45.0 -> v1.46.0
go.opentelemetry.io/otel/exporters/otlp/otlptrace	v1.44.0 -> v1.45.0
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc	v1.44.0 -> v1.45.0
go.opentelemetry.io/otel/metric	v1.45.0 -> v1.46.0
go.opentelemetry.io/otel/sdk	v1.45.0 -> v1.46.0
go.opentelemetry.io/otel/trace	v1.45.0 -> v1.46.0
go.opentelemetry.io/proto/otlp	v1.10.0 -> v1.11.0
go.yaml.in/yaml/v3	v3.0.4 -> v3.0.5
golang.org/x/image	v0.41.0 -> v0.45.0
golang.org/x/net	v0.57.0 -> v0.58.0
google.golang.org/genproto/googleapis/api	v0.0.0-20260526163538-3dc84a4a5aaa -> v0.0.0-20260803160001-6ac0973c030d
gopkg.in/ini.v1	v1.67.2 -> v1.67.3