test(parity): add pinned Python manifest checks

[rayrayraykk]

Linked Issues

• Related to feat: align TypeScript SDK with AgentScope Python incrementally #49

Description

Background and purpose

The incremental parity rollout needs a reproducible inventory before runtime PRs begin. This independent Phase 0 PR pins the Python source baseline and makes later module coverage auditable.

Changes

• Pin AgentScope Python commit de163b34b909edaba3c174190ad7e1a355e7849f.
• Add deterministic source, contract-data, and test inventory generation.
• Add input-order-independent aggregate SHA-256 digests.
• Validate manifest structure, file counts, duplicate paths, statuses, and the checked-out Python commit.
• Add focused tests for the manifest library.
• Add an isolated CI job that checks out Python and verifies the committed manifest.
• Document regeneration and verification in parity/README.md.

Scope

This PR contains no runtime TypeScript changes, public APIs, provider/Agent/Service/Desktop implementations, or final Python main delta.

Review guide

1. Review the five handwritten files under scripts/parity/ and their tests.
2. Review parity/README.md for workflow and invariants.
3. Do not review the generated JSON line by line; reproduce it with parity:generate and verify it with parity:check.
4. Review the isolated parity-manifest CI job last.

The generated manifest accounts for most of this PR's line count.

Verification

With the pinned Python repository checked out next to this repository:

npx --yes pnpm@9.15.9 install --frozen-lockfile
npx --yes pnpm@9.15.9 format
npx --yes pnpm@9.15.9 run test:parity
node scripts/parity/check-manifest.mjs --python-root ../agentscope-python

Local verification passed:

• 5 parity-tooling tests.
• Pinned-checkout manifest verification.
• Inventory of 429 Python source files, 104 contract-data files, and 160 Python test files.
• Frozen-lockfile installation.
• Formatting with no diff.

GitHub Actions passed on Ubuntu, macOS, and Windows, including the dedicated parity-manifest job.

Dependency

• Base: main
• Depends on: none
• Can be reviewed independently from build: stabilize package boundaries and smoke tests #50
• Full snapshot for reference only: rayrayraykk:feat/parity-foundation

Checklist

• This PR is linked to a related issue (see above)
• Code has been formatted with pnpm format
• Related documentation has been updated (parity/README.md)
• All tests are passing (pnpm test and the focused commands above)
• Code is ready for review

[rayrayraykk]

Closing this internal parity-infrastructure PR. Generated inventories and migration tooling will stay out of upstream feature submissions.