[P2-018] Make claims, handoff and completion follow-ups reliable

[deku2026]

Focused repair of the parallel execution rules; the delivery graph's tasks, prerequisites, obligations and the baseline are unchanged (complete through WP03.02; WP03.03 not started).

Rule changes (docs/planning/delivery/README.md)

• DLV-26 (claims). One key per ID: lower case, dots replaced by hyphens (claims/con-02, task/con-02, ledger/tasks/con-02.md).
  • Git for Windows cannot store a ref, branch or file named con.02. Verified locally: CON is a reserved device name, which breaks every CON.* task.
  • Every claim change is a compare-and-swap on the exact claim commit that was read.
  • Only the claimant at the current epoch renews, updates, blocks, releases or completes a claim. Re-claim, takeover and completion follow-up append the next epoch.
• DLV-27 (handoff and fencing). Voluntary handoff (release with a current handoff record, immediate re-claim) is separated from recovery of an expired lease. The recovery rule adds a one-hour wait after the release request. Merges are bound to the reviewed head commit.
• New rules:
  • DLV-40: the claim record is the durable handoff, updated at each checkpoint.
  • DLV-41: a delivered task becomes a completion follow-up once its completion prerequisites complete; upstream completion alone is not its acceptance.
  • DLV-42: workers, reviewers, integration owners and an optional coordinator are replaceable sessions with no state outside records, pull requests and the ledger.
• DLV-29 (integration owner). The role is held through roles/integration-<repository>, so the current owner is discoverable. Any worker may assume a vacant role.
• DLV-11/31/37 (exclusive phases). An exclusive phase binds every task that enters it. The build slot uses the workstation lock instead of a lease branch.
• DLV-23/28/33/38 and section 9. Delivered tasks have no owner while waiting. Completion evidence adds the pull requests, reviewed and merge commits (titles keep the task IDs) and CI/publication evidence. Bundles keep separate handoff records.

Graph and views

• Resource protocols now name how each exclusive phase is taken:
  • the build slot (workstation lock);
  • live runs on the deployed Cloud and AI environments (leases/res-cloud-deployment, leases/res-ai-workflow-and-routes);
  • the Android module-skeleton restructuring (leases/res-mobile-build-config).
• The 34 build-slot declarations change from append to exclusive.
• The nine repository adoption tasks' ledger write scopes use the new key names.
• adoption.md ledger record names are updated.
• Views are regenerated with the Plan tool from the companion Plan-B pull request. Lane records now name each task's claim, branch, ledger record and integration role.

Validation

• python tools/delivery.py check passed: 529 tasks, 58 adoption slices, 110 views current, 0 warnings, ledger valid.
• A link and anchor check over the changed documents found no problems.
• Merge this before the companion Plan-B pull request.

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