caused by the previous merge commit.

Move the definition of struct _stackless_runtime_state from
stackless_structs.h to stackless_tstate.h and remove the include of
stackless_structs.h from pystate.h. Resolve conflicts/warnigs caused
by including "platf/slp_platformselect.h" into stackless_tstate.h

Unfortunately the new test for subinterpreters still fails.

Windows specific API compatibility defines don't belong to our headers.

Move the definition of struct _stackless_runtime_state from
stackless_tstate.h to the new file stackless_pystate.h.
Now internal/pystate.h includes stackless_pystate.h and
pystate.h includes stackless_tstate.h.

stackless_impl.h no longer includes "structmember.h", "compile.h" and
"platf/slp_platformselect.h"

Move type definitions to stackless_structs.h
Move API declarations to stackless_api.h
Move declarations of pickle functions to prickelpit.h
Include frameobject.h only if needed.

Now all macros defined by Stackless start with SLP_ or STACKLESS_ or contain
STACKLESS in their name.

Bounded option-(b) commit per supervisor 07:27:48Z disposition: lands
five canonical reference docs that were previously local-only working
drafts, restoring fresh-clone integrity for the in-tree bug-(ii)
sentinel + known-bugs entry pushed at 9a0fc0e.

  docs/parked-bug-audit-2026-04-24.md
    Theologian's parked-bug audit (Groups A/B/C/D, Coverage-Trigger
    Rule). Adds Group E for W-PYTORCH-CM-(ii) per librarian
    07:22:18Z + theologian 07:22:57Z back-reference request after
    docs/known-bugs/bug-ii-storeattr-corruption.md landed: cross-refs
    the in-tree known-bugs entry, enumerates the Coverage-Trigger
    surface (caller adds, threshold lowering, fixture extensions on
    nested __enter__/__exit__ patterns and _NoGrad/_Autocast/
    _ProfileScope-class fixtures), cites the heavy-tier design docs,
    and re-states the skip-list anti-pattern. Scope-frozen marker
    extended to acknowledge director-approved additions (Group D
    Alex 2026-04-24 13:49:03Z; Group E Alex 2026-04-27 07:12:25Z
    D-1777270945).

  docs/post-phase3d-pure-c-roadmap.md
    Theologian's post-Phase-3D pure-C area-prioritization spec
    promoted to canonical roadmap by supervisor 07:20:19Z (5
    decision points pre-decided: bottom-up phase ordering,
    parallel Phase 4 entry, full pure-C pyjit, opportunistic
    parallelism for Phase 7/X, bug-(ii) sequenced behind roadmap).

  docs/w-pytorch-cm-tooling-note.md
  docs/w-pytorch-cm-allocate-counter-design.md
  docs/w-pytorch-cm-tp-alloc-watchpoint-design.md
    Source-trace + two heavy-tier instrumentation designs referenced
    from the in-tree docs/known-bugs/bug-ii-storeattr-corruption.md.
    Landing them in-tree closes the broken-link risk on fresh clone.

Excluded per supervisor: docs/supervisor-pre-post-checklist-spec.md
(artifact-only per pythia python#185 + theologian 06:17:16Z disposition).
Other untracked docs in docs/ are separate institutional debt and
out of scope for this commit.

No JIT/build/codegen surface; doc-only.

Institutional-debt audit (a) per librarian 11:58:08Z + supervisor
11:58:33Z. Ten W-series workstream docs + two active specs that have
been treated as canonical references in chat (with scribe D-IDs in
several cases) but never committed to the integration branch — closes
the broken-link risk on fresh clone for any agent following an
in-chat reference to one of these files.

  Active specs (2):
    docs/tier7-runtime-burndown-spec.md
    docs/w-i3-runtime-assert-spec.md

  W-series (9, in scribe + on disk + uncommitted):
    docs/w-preexisting-audit.md
    docs/w18-mechanism.md
    docs/w22-liveness-fix-falsification-gate.md          (D-1776941699,
                                                          D-1776943831,
                                                          D-1776944364)
    docs/w31-getrpotraversal-cport-falsification.md
    docs/w32-gate-phoenix-wiring-repair.md
    docs/w33-zero-bridge-verifier-script.md
    docs/w34-static-retroactive-test-pass.md
    docs/w42-refcount-correctness-verifier.md
    docs/w43-pydebug-match-statement-pre-existing.md

  Excluded per supervisor 11:58:33Z:
    docs/supervisor-pre-post-checklist-spec.md  artifact-only per
                                                pythia python#185 + supervisor
                                                06:17:44Z disposition;
                                                NOT in-force policy.

  Deferred to a follow-up audit (institutional-debt audit (b)):
    docs/phase-crtp-elimination-plan.md
    docs/phase-h2-plan.md
    docs/phase-h2e-container-plan.md
    docs/phase3d-next-subsystem-plan.md
    Need verification of whether each is SUPERSEDED by
    docs/post-phase3d-pure-c-roadmap.md or
    docs/phase4-hir-burndown-spec.md before delete-vs-archive.

Doc-only commit. No JIT/build/codegen surface; trivial-push exemption.
Precedent: D-1775393031 (untracked benchmark docs landed via git add +
commit, same institutional-artifact-restoration pattern).