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Fix `History` copy and decode bookkeeping, stale lazy shots, and small core bugs (#173)

* Keep History bookkeeping through copy, decode and append

A copied or decoded History lost its frames' expiry and no-serialize
bookkeeping, so stale reads gave no warning and rewrites grew (#157).

- Copying a History gives it frames of its own and its expiry
  locations, so a QuantumProgram given a History initial history warns.
- Decoding restores the stored frames instead of appending them again,
  so a read-back history hashes equal to the one written.
- Frame.update keeps no-serialize marks; append expires through
  Frame.expire, and no_serialize skips a key that is already marked.
- Minor: round-trip, copy, rebuild and run tests; checkpoint test
  compares whole histories; docstrings.

Co-authored-by: claude-sonnet-5-5 <noreply@anthropic.com>
Co-authored-by: claude-opus-5-5 <noreply@anthropic.com>

* Fix stale lazy shots, QSim copies and small bugs (#157)

A replaced shot no longer reads back stale, a copied QSim state no
longer shares pending gates, and inputs that failed now work or fail up
front.

- add_shot drops a replaced shot's lazily read cache entry, so
  get_shot_history returns the new shot, as collect_shot_data does.
- QSimQuantumState(other_state) deep-copies its source, as copy() does.
- Repeat-until-success map_qubits maps expected only when it's a
  MeasurementOutcomes, so the default bool expected works.
- ProgramResults refuses max_memory_shots below 1 with ValueError, and
  MeasurementOutcomes accepts NumPy integer and bool scalars.
- Minor: the invalid-index error names its instruction; docstrings;
  tests; CHANGELOG entry for #157.

Co-authored-by: claude-sonnet-5-5 <noreply@anthropic.com>
Co-authored-by: claude-opus-5-5 <noreply@anthropic.com>

* Expire stale state in a History initial history

A QuantumProgram given a History initial history that didn't expire
state now warns on reads of that state after a run, as it does for a
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