Implement Determa State format 1 core conformance

[fruwe]

Summary

• Replace the obsolete pre-format-1 engine with the strict format-1 bundle loader,
  validator, AST-checked portable CEL profile, pure create/dispatch API, and
  portable logical aggregate.
• Implement hierarchy, local/unmarked transitions, choices, history, typed variables
  and payloads, isolated components, owned spawn/cancel, lifecycle ordering, atomic
  faults, deterministic identities, bundle fingerprinting, and recursive prior-state
  validation.
• Enforce profile-owned recursive CEL collection equality/membership, exact portable
  conversions, and closed static send payload validation.
• Preserve unbounded mathematical logical counters while retaining signed-64-bit
  variable/payload values, and reject impossible committed lifecycle and fault states.
• Use one canonical descendant traversal for completion, stop, cancel, holder cleanup,
  and parallel disposal, including ownership-scoped cancellation, frozen subtree
  disposal, and atomic cascade_fault translation.
• Enforce exact portable scalar resolution, frozen retained-faulted subtrees, caller
  ownership of delivery envelopes and prior state, and normative cause/event/effect
  identity vectors.
• Remove abandoned grammar/API behavior and non-core queue, timer, store, snapshot,
  migration, export, and enabled-event assumptions.
• Package the exact normative schema, add a current format-1 example, and update
  repository documentation and guidance.
• Pin CI and the local conformance harness to immutable approved specification and
  conformance commits.

Closes #59.

Immutable Inputs

• Specification: 4bd4d9588d11b75d376380b6120676a056a4bc45
• Conformance: fc4842010ab8d83bf4c5c6280a5627ca86829f7f

Validation

• ruff check .
• mypy src/determa
• pytest -q - 172 passed
• DETERMA_CONFORMANCE_DIR=/tmp/determa-state-conformance-final-fc4842 DETERMA_SPEC_DIR=/tmp/determa-state-spec-final-4bd4d9 pytest conformance -q - 80 passed
  (75 core cases, suite presence, schema parity/meta-validation, and semantic loading
  of the authoritative minimal/full examples)
• python -m build
• Clean wheel installation and semantic validation of the repository example plus the
  authoritative minimal/full examples
• Clean-wheel validation of recursive collection equality and the unchanged 0.0.6
  package version
• git diff --check

The lint, type, unit, conformance, build, and installed-wheel gates use Python 3.13,
the version used by CI.

Version And Exclusions

The distribution version remains 0.0.6. This PR does not tag, publish, or release.

Snapshot wire portability, definition migration or hot-swap, package imports,
conformance/engine changes in other repositories, the tutorial, and the examples
repository are explicitly excluded.