fix: raise openjd-model floor to >= 0.11.4

[leongdl]

Raise the openjd-model floor from >= 0.11.2 to >= 0.11.4.

openjd-model 0.11.4 gives openjd.expr.SerializedSymbolTable a JSON transport form (to_json_str / from_json_str). That transport is how a caller gets a resolved table across a process boundary and into the v1 Session's resolved_symtab — a scheduler resolves with create_job_with_symbol_tables, persists the JSON, and a worker reconstructs it. Before 0.11.4 the only constructor is from_symtab, so that path is not expressible and resolved_symtab is only usable in-process.

Nothing in this package's own source calls the new accessors, so this is a floor raise for the caller contract, not an import requirement — sessions still imports fine against 0.11.2. The floor comment now also records the 0.11.2 hard lower bound (the EXPR/WRAP_ACTIONS model surface this package does import) so it does not get lowered past the point where imports break.

What was the problem/requirement? (What/Why)

openjd-model 0.11.4 is released and on PyPI. The floor here still pointed at 0.11.2, so consumers resolving openjd-sessions could land on a model version whose SerializedSymbolTable cannot round-trip through JSON, leaving the resolved_symtab parameter half-usable.

What was the solution? (How)

One-line floor bump in pyproject.toml, plus a rewrite of the adjacent comment. The old comment said "0.11.1 is the floor" while the pin read 0.11.2; the replacement states the 0.11.4 rationale and keeps the 0.11.2 hard bound as a separate "do not drop below" note.

What is the impact of this change?

Consumers of openjd-sessions must resolve openjd-model >= 0.11.4. No runtime behavior change in this package.

How was this change tested?

• Have you run the unit tests? Yes. Fresh venv, pip install -e . resolved openjd-model 0.11.4, confirmed SerializedSymbolTable.to_json_str / .from_json_str are present, and ran test/openjd/sessions_v1, test_runner_base.py, test_runner_step_script.py: 183 passed, 11 skipped, 3 xfailed.

Was this change documented?

The dependency comment in pyproject.toml is updated. No docstrings affected.

Is this a breaking change?

No. It narrows a dependency range; the public interface is unchanged.

Does this change impact security?

No.

Cross-port to openjd-rs

• This change does not affect runtime behavior (docs / tests / tooling only)

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