fix(orchestration): bind review and acceptance repositories

[Ldsystem]

Summary

• resolve review-package Git refs and diffs from the validated task execution binding
• evaluate plan-level acceptance in the material execution repository, not the workspace control repository
• select the fresh repository recorded by the terminal passing integration handoff when task worktrees have non-linear squash histories
• keep generated review-package output under the workspace control root
• add regressions for separate control/execution repositories and multi-worktree terminal acceptance

Validation

• canonical full suite before the terminal-root refinement: 527 passed
• affected workflow-contract suite after the final refinement: 53 passed
• real archived plan knowledge and acceptance gates: 7 validated handoffs, passed
• git diff --check: passed
• independent local Cursor/Grok review: accepted exact head c8a95e0a967b614146d4efc1dcfefe8a3dab49ce, no findings

Safety

• no public CLI change
• ambiguous repositories still fail closed when no unique fresh acceptance root exists
• remains open and unmerged pending review