Signed-off-by: Liam Crumm <liamcrumm@gmail.com>

The stub-removal cleanup over-deleted still-valid reference content. This
restores it while keeping the genuine feature removals and the de-claiming
intact.

Docs restored (verified against the live code, no removed symbols reintroduced):
- api-reference.md back to the real 18-route surface with the Table of
  Contents, response-body examples, query/request tables and 404s, plus the
  requires_consensus, requires_sre_witness and actions fields that still exist
- README.md and packages/agent-hypervisor.md back to full configuration,
  architecture and feature docs, with the benchmarks link and standard badges
  restored (PyPI version badge stays out since the standalone package is a
  deprecation stub)
- 11-saga-orchestration and 06-execution-sandboxing back to teaching
  SagaOrchestrator and execution rings; broken classify_action_id samples
  rewritten to the real classify(ActionDescriptor) API and verified runnable
- 13-observability event counts corrected to 30 total (Saga 7, Audit 2)

CI gate fixes:
- add the MIT header to scripts/verify_tutorials_01_34.py
- fix the CODEOWNERS relative link in docs/reference/contributing.md
- add pandas/plotly and ASCII-diagram terms to the cspell dictionary
- normalize licence to license in tutorial 45
- drop the unused CausalViolationError import flagged by code-quality

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Signed-off-by: Liam Crumm <liamcrumm@gmail.com>

1. AUDIT-COMPLIANCE-1.0.md: restore the blank padding row in the audit
   diagram (the de-claim had duplicated DeltaEngine where CommitmentEngine
   used to be).
2. cspell: drop the global "tion", "reputa" and "Orchestr" entries that would
   mask real typos; instead reword the two ASCII boxes so no word is truncated
   (reputa/tion to author/screen, Orchestr. to the full Orchestrator).
3. isolation.py: delete the dead IsolationLevel.requires_intent_locks property
   (its only consumer, session/intent_locks.py, was removed) and its three
   value assertions in tests/unit/test_session_security.py.
4. BREAKING_CHANGES.md: add an entry recording the 18 removed public
   hypervisor symbols and their agent_runtime re-exports.

Verified: hypervisor suite 640 passed 23 skipped; cspell clean without the
dropped dictionary entries; ruff clean; 0 new broken links.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Signed-off-by: Liam Crumm <liamcrumm@gmail.com>

Consequence/obligation + correctness re-review of the current head surfaced
these, all now fixed and verified:

- BREAKING_CHANGES.md: the removed public export set is 23, not 18. Add the 5
  companion types that were also removed from hypervisor and agent_runtime
  __all__: VouchRecord, AttributionResult, LedgerEntryType, LockContentionError,
  DeadlockError.
- constants.py: remove 4 dead VOUCHING_* constants whose only consumer was the
  deleted liability/vouching.py (same orphan class as the already-removed
  enable_blockchain_commitment and requires_intent_locks). Zero consumers remain.
- api-reference.md: fix 3 restored code samples that imported from the wrong
  sub-package and would ImportError on copy-paste (SagaOrchestrator and
  ActionClassifier are top-level; KillReason lives in
  hypervisor.security.kill_switch). Also correct 3 stale event-type values to
  match EventType: ring.breach_detected, security.agent_killed, audit.committed.
- acp-cli.py: benchmark/ to benchmarks/ in a print string left over from the
  directory rename.
- test_spec_audit_compliance_conformance.py: drop "and commitment" from a
  docstring after the commitment sub-tests were removed.

Verified: hypervisor suite 640 passed 23 skipped; agent-os conformance 152
passed; constants.py ruff clean; cspell clean; 0 new broken links; every
hypervisor import across all changed docs resolves (AST sweep of 108).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Signed-off-by: Liam Crumm <liamcrumm@gmail.com>