docs(pto): correct initial state catalog

[zhoubot]

Summary

Correct the PTO ASL state-graph design and rollout plan after the implementation audit found one omitted global ASL variable: _SystemRegisters in the system-register addressing unit.

The merged compiler behavior is unchanged. PTO-SPEC PR 66 already publishes the corrected twelve-state catalog.

Changes

• split the former system-register row into:
  • PTO-STATE-ARCH-SYSTEM-REGISTERS for _SystemRegisters at its ASL owner;
  • PTO-STATE-ARCH-EXTENDED-SYSTEM-REGISTERS for _ExtendedSystemRegisters and _CurrentACR;
• update every rollout-plan count from 11 to 12;
• require all 75 global ASL var declarations to be covered exactly once;
• add the missing ASL owner file and state ID to the implementation checklist.

Why

The long-term flow must fail closed on unindexed architecture state. Counting only the originally selected catalog allowed one real ASL state variable to remain outside NDF. The corrected contract is a complete partition, so a future global state addition cannot silently escape the graph.

Verification

cargo test --workspace --all-features --locked
  PASS: all CLI, compiler, adapter, graph, impact, and documentation contract tests

git diff --check
  PASS

No executable Rust code, canonical schema, or PTO semantics change in this PR.