Incorporate changes for restic standalone pkg

[arnab-baishnab]

No description provided.

[Copilot]

Pull request overview

This PR vendors and switches the CLI to use the new standalone gomodules.xyz/restic package instead of kubestash.dev/apimachinery/pkg/restic, aiming to support “restic standalone pkg” integration.

Changes:

• Added vendored gomodules.xyz/restic module and updated go.mod/go.sum/vendor/modules.txt.
• Updated CLI commands to import gomodules.xyz/restic and adjusted setup to pass encryption secrets as *core.Secret.
• Added a helper to fetch the encryption secret from the cluster.

Reviewed changes

Copilot reviewed 8 out of 28 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
go.mod / go.sum	Adds dependency on gomodules.xyz/restic and updates module sums.
vendor/modules.txt	Vendors gomodules.xyz/restic with explicit Go version info.
vendor/gomodules.xyz/restic/*	Introduces the standalone restic wrapper implementation (commands, backend config, env setup, locking helpers, etc.).
pkg/view.go	Switches restic import and updates wrapper setup for manifest viewing.
pkg/download.go	Switches restic import and updates wrapper setup for snapshot download.
pkg/restore.go	Switches restic import and updates wrapper setup for manifest restore flow.
pkg/unlock.go	Switches restic import and updates wrapper setup for unlock flow.
pkg/add_key.go	Switches restic import and updates wrapper setup for restic key management.
pkg/common/types.go	Updates restic types in shared options to the new module.
pkg/util.go	Adds getEncryptionSecret helper for retrieving core.Secret.

Comments suppressed due to low confidence (1)

pkg/add_key.go:146

• gomodules.xyz/restic requires Backend.ConfigResolver (plus storage credentials in StorageSecret) to be present during wrapper configuration. The backend created here lacks those fields, so NewResticWrapper will fail before running the docker restic command. Add a resolver that loads the referenced BackupStorage + secret data into the backend.

	setupOptions := &restic.SetupOptions{
		Backends: []*restic.Backend{
			{
				Repository:       opt.repo.Name,
				EncryptionSecret: encryptSecret,
			},
		},
		ScratchDir: ScratchDir,
	}

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