feat(cli): add daemon command

[paralta]

Adds dirctl daemon start|stop|status — a self-contained local directory server that bundles the gRPC apiserver and reconciler in one process with embedded SQLite and filesystem OCI store.

• Add dirctl daemon subcommands (start, stop, status) with PID file management, --data-dir override, and SIGTERM graceful shutdown
• Export server.Start() and refactor reconciler/service.New() to accept DB/store/config so both can be embedded by the daemon
• Change indexer task from *remote.Repository to registry.TagLister interface to support local OCI stores
• Add walkReferrersViaPredecessors fallback in OCI store so sign/verify work on local layout stores without the Referrers API
• Add test:e2e:daemon Taskfile task and Ginkgo test suite covering push, pull, sign, and verify against a running daemon
• Register daemon e2e job in CI workflow matrix

[github-actions]

The latest Buf updates on your PR. Results from workflow Buf CI / verify-proto (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	⏩ skipped	⏩ skipped	✅ passed	Mar 31, 2026, 8:52 AM

[ramizpolic]

nit: we dont need to redeclare a new method for checking running state, simply reuse from utils package github.com/agntcy/dir/tests/e2e/shared/utils

Suggested change

	gomega.Expect(waitForServerReady(addr)).To(gomega.Succeed())
	ginkgo.GinkgoWriter.Printf("Waiting for Directory daemon at %s...\n", addr)
	gomega.Eventually(utils.IsGrpcServerReady).
	WithArguments(addr).
	WithPolling(readyPollInterval).
	WithTimeout(readyTimeout).
	Should(gomega.Succeed())
	ginkgo.GinkgoWriter.Printf("Directory apiserver is daemon at %s\n", addr)

[ramizpolic]

LGTM