[python] Add mock_api coverage for single-discriminator no-subtypes and body-root nested scenarios

[Copilot]

This adds python mock API coverage for new Spector scenarios introduced by the cross-language spec updates (PR #10841): a discriminated model with no declared subtypes, and a @bodyRoot parameter nested inside a wrapper model. The PR extends existing single-discriminator tests in both sync and async suites, adds new shared body-root tests, and aligns local spec inputs to a version that contains the scenarios.

• Test coverage: single-discriminator no-subtypes (shared sync/async)

  • Extended existing shared tests to cover:
    • get_no_subtypes_model()
    • put_no_subtypes_model(...)
  • Added Fish model assertions to validate the expected wire payload shape (kind, size).

• Test coverage: body-root nested (shared sync/async)

  • Added new shared tests (test_parameters_body_root.py and asynctests/test_parameters_body_root_async.py) covering the nested(...) operation with a BodyRootModel (category, link_type, was_successful).
  • Validated locally against the Spector mock server.

• Spec dependency update for scenario availability

  • Updated @typespec/http-specs in packages/http-client-python/package.json (and lockfile) to a version containing the new scenario definitions used by regeneration.

• Change tracking

  • Added a Chronus internal entry for @typespec/http-client-python.

def test_get_no_subtypes_model(client):
    assert client.get_no_subtypes_model() == Fish(kind="salmon", size=10)

def test_put_no_subtypes_model(client):
    client.put_no_subtypes_model(Fish(kind="salmon", size=10))

def test_nested(client):
    client.nested(BodyRootModel(category="widget", link_type="hard", was_successful=True))

Note: The third scenario from PR #10841, Parameters_Query_SpecialChar_dollarSign, is intentionally not covered. There is an upstream spec inconsistency where main.tsp declares @route("/dollarSign") (camelCase) while mockapi.ts registers the endpoint at /dollar-sign (kebab-case). The mock server only serves /dollar-sign, while the generated SDK correctly calls /dollarSign, so the test would 404. This requires a fix in @typespec/http-specs before SDK coverage can pass.

[msyyc]

@copilot resolve the merge conflicts in this pull request

[Copilot]

@copilot resolve the merge conflicts in this pull request

Resolved the merge conflict in packages/http-client-python/package-lock.json (version conflict — kept 0.31.0 from main to match package.json) and completed the merge of origin/main in 6f0cf3d.

[msyyc]

follow https://github.com/microsoft/typespec/blob/main/.github/skills/python-sdk-spector-mock-api-tests/SKILL.md to add test case for #10841.

NOTE: there is already some test added but you miss some. @copilot

[Copilot]

Added the missing coverage. PR #10841 introduced three scenarios:

• Type_Model_Inheritance_SingleDiscriminator_get/putNoSubtypesModel — already covered.
• Parameters_BodyRoot_nested — now covered (sync + async, shared) in test_parameters_body_root.py / asynctests/test_parameters_body_root_async.py. Validated locally against the Spector mock server (both pass).
• Parameters_Query_SpecialChar_dollarSign — not added because of an upstream spec inconsistency: main.tsp declares @route("/dollarSign") (and spec-summary.md documents /dollarSign), but mockapi.ts registers the endpoint at /parameters/query/special-char/dollar-sign. The mock server only serves /dollar-sign, while the generated SDK correctly calls /dollarSign, so the test 404s. This needs a fix in http-specs (align the mockapi.ts uri with the route) before SDK coverage can pass. Let me know if you'd like me to proceed once that's corrected.

Done in 19224f7.