refactor: rename common package to healthcheck

[jason-lynch]

Summary

Renames the common package, which only contained a health check interface, to healthcheck. This is to deconflict with a new common package that we'll add in a subsequent PR.

Testing

There should be no functional changes from this PR.

PLAT-417

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📝 Walkthrough

Walkthrough

This pull request migrates health check types from the common package to a dedicated healthcheck package. The ComponentStatus type and HealthCheckable interface are moved to the new package namespace, with all dependent files updated to reference the relocated definitions.

Changes

Cohort / File(s)	Summary
Healthcheck Package Definition server/internal/healthcheck/healthcheck.go	Renamed package declaration from common to healthcheck, changing the namespace for exported ComponentStatus type.
Docker Integration server/internal/docker/docker.go	Updated imports and changed interface assertion and method signature to use healthcheck.HealthCheckable and healthcheck.ComponentStatus.
Etcd Integration server/internal/etcd/interface.go, server/internal/etcd/embedded.go, server/internal/etcd/remote.go	Updated imports and changed interface embeddings and method signatures across etcd components to reference healthcheck.HealthCheckable and healthcheck.ComponentStatus.
Host Status Handling server/internal/host/host.go, server/internal/host/host_status_store.go, server/internal/host/service.go	Updated imports and changed Components field types from map[string]common.ComponentStatus to map[string]healthcheck.ComponentStatus in HostStatus and StoredHostStatus types.
Orchestrator Integration server/internal/orchestrator/swarm/orchestrator.go	Updated imports and changed component status type from common.ComponentStatus to healthcheck.ComponentStatus in PopulateHostStatus.

Poem

🐰 ✨ Hop, hop, hurray! The types have moved,
From common grounds to healthcheck grooves,
A cleaner path, more focused still,
Where wellness checks bend to their will,
PackagesMigrate with rabbity zeal!

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The description covers the Summary and Testing sections but omits several required sections including Changes, Checklist items, and Notes for Reviewers.	Expand the description to include a bulleted Changes section detailing modified files, complete the Checklist with appropriate selections, and add any relevant Notes for Reviewers.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately and concisely describes the main change: renaming the common package to healthcheck to avoid future conflicts.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/PLAT-417/core-systemd-resources-pt2

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[jason-lynch]

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