docs: add Phase 2 implementation plan and rename Phase 1 for consistency

Add implementation plan for Phase 2 of ADR-0038 (transitive dependency
resolution). Rename the existing Phase 1 plan to -phase1 for consistent
naming. Cross-references added between the plans and from ADR-0038.

Signed-off-by: Greg Allen <gallen@redhat.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ggallen

README.md

@@ -42,7 +42,8 @@ This is not a product spec. It's an evolving exploration of a hard problem space
   - [konflux-ci](docs/problems/applied/konflux-ci/) — Kubernetes-native CI/CD platform (the original proving ground)
 - **[docs/plans/](docs/plans/)** — Implementation plans for accepted or in-progress designs:
   - [Universal Harness Access](docs/plans/universal-harness-access.md) — Making harnesses and agents universally accessible via URLs and paths, enabling community sharing and composability
-  - [Universal Harness Access — Implementation](docs/plans/universal-harness-access-implementation.md) — Phased PR breakdown for ADR-0038 Phase 1 (MVP)
+  - [Universal Harness Access — Phase 1 Implementation](docs/plans/universal-harness-access-phase1.md) — Phased PR breakdown for ADR-0038 Phase 1 (MVP)
+  - [Universal Harness Access — Phase 2 Implementation](docs/plans/universal-harness-access-phase2.md) — Phased PR breakdown for ADR-0038 Phase 2 (transitive dependency resolution)
   - [Agent Execution Environment](docs/plans/agent-execution-environment.md) — Sandbox and runtime environment for agent execution
   - [Vertex AI Inference Provisioning](docs/plans/vertex-inference-provisioning.md) — Provisioning and configuration for Vertex AI inference endpoints
   - [ADR-0046 Drift Scanner](docs/plans/2026-03-06-adr46-drift-scanner.md) — Implementation plan for ADR-0046 drift detection tool

docs/ADRs/0038-universal-harness-access.md

@@ -343,4 +343,4 @@ The proposed model follows the GitHub Actions approach: URL-based references wit
 
 ## Implementation Plan
 
-See `docs/plans/universal-harness-access.md` for full implementation details, security analysis, and migration path. See `docs/plans/universal-harness-access-implementation.md` for the phased PR breakdown (Phase 1 MVP).
+See `docs/plans/universal-harness-access.md` for full implementation details, security analysis, and migration path. See `docs/plans/universal-harness-access-phase1.md` for the phased PR breakdown (Phase 1 MVP) and `docs/plans/universal-harness-access-phase2.md` for Phase 2 (transitive dependency resolution).