[DOCS-02] Publish 30-minute authentication, tenant, device, and command quickstart

[jaavid]

Background

CoreLink is managed as one product across multiple implementation repositories. This work is the executable feature owned by developer-docs under EPIC-05.

Problem

The current repository state does not yet provide verified, release-ready evidence to publish 30-minute authentication, tenant, device, and command quickstart.

Goal

Publish 30-minute authentication, tenant, device, and command quickstart with observable acceptance evidence and no divergence from the product-level contract.

Parent

• Primary Product Epic: EPIC-05
• Backlog ID: DOCS-02

Scope

• Deliver the outcome stated in the title within the developer-docs implementation boundary.
• Reconcile affected contracts, tests, documentation, security, tenancy, observability, migration and release behavior.
• Retain acceptance evidence suitable for the Developer Platform product gate.

Out of Scope

• Creating a separate repository roadmap.
• Expanding into adjacent product domains without an accepted Product Epic or decision record.
• Claiming completion based only on code merge when operational or customer validation is required.

Acceptance Criteria

• The stated outcome is implemented or documented at the correct repository boundary.
• Expected, failure and recovery paths are covered by repeatable checks or retained evidence.
• Tenant isolation, authorization and sensitive-data behavior are reviewed where applicable.
• Public/internal contract and compatibility impacts are reconciled.
• Documentation, observability, migration/rollback and release notes are updated where applicable.
• Evidence is attached or linked and the parent Epic exit criteria are measurably advanced.

Technical Notes

Preserve canonical identifiers, provider-neutral public behavior, idempotency and backward compatibility. Prefer the existing modular-monolith boundary unless measured scale, security isolation or ownership requires extraction.

Dependencies

• Blocked by: DOCS-01, accepted contract slice
• Blocks: To be resolved during refinement.
• Cross-repository work: Link concrete Issues during refinement; do not duplicate their implementation here.

Planning Metadata

• Type: Feature
• Priority: P0
• Product milestone: Developer Platform
• Domains: docs, devex
• Area: documentation
• Complexity: L
• Initial status: Triage
• DRI: Unassigned
• Intended labels: type:feature, priority:p0, domain:docs, domain:devex, area:documentation

Definition of Done

• Acceptance criteria demonstrated.
• Required tests and evidence pass.
• Contracts are updated or confirmed unaffected.
• Security and tenant boundaries are reviewed.
• Migration and rollback paths are verified where applicable.
• Observability and runbooks are updated where applicable.
• Documentation and release notes are updated.
• Pull request(s) are merged and linked.