[F2-TASK-159] Add tier-2 fixture packs

[duksh]

Execution Metadata

• Issue ID: F2-TASK-159
• Phase: P13
• Type: TASK
• Owner Team: qa-team
• Priority: P1
• Status (initial): Todo
• Depends On: F2-STORY-156

Acceptance Criteria

OCI/IBM/Alibaba/Huawei fixture sets created

Artifact Paths

• tests/contracts/fixtures/mcp/

Quality Gates

• contract-drift

Labels (from registry)

fixtures,tier2

Source Registry

• docs/roadmap/ficecal-v2-task-issue-registry.csv
• docs/roadmap/ficecal-v2-execution-plan-updated.md
• docs/roadmap/ficecal-v2-recovery-index.md