CFI-04: Add Hash companion manifest reader

[ProfRandom92]

Objective

Add a lightweight Hash companion manifest/config reader so the local companion can load hybrid execution settings without running validation locally.

Scope

• Read config/hash-companion/hybrid-execution.yaml.
• Read CI result contract metadata when available.
• Expose status-only data for chilli/hatch-pet UI.
• Preserve degraded local runner behavior.

Likely files

• src/ or dashboard/ location matching existing architecture
• docs/hash-companion/manifest-reader.md
• lightweight tests if existing patterns support them

Acceptance criteria

• Reader returns local runner degraded state.
• Reader does not execute commands.
• Reader exposes cloud_ci as authoritative target.
• Reader handles missing CI result artifact gracefully.

Non-goals

• No pet asset changes.
• No local validation execution.
• No UI implementation yet.

Dependencies

• CFI-01: Define Cloud CI result contract for Hash/chilli #50
• CFI-02: Implement cloud-backed validation_runner workflow #51
• CFI-03: Build Hash/chilli CI artifact publisher #52

Execution recommendation

Cloud implementation, no local runtime dependency.

Codex prompt

Implement CFI-04 only. Add a lightweight Hash companion manifest/config reader that loads hybrid execution settings and exposes status-only data. Do not execute local commands.