feat(packaging): V7 distribution split — add quant-platform-* package manifests

[magic-alt]

Summary

V6 Phase 7 — distribution split: introduce independent installable packages for each platform layer.

Changes

• Add packages/quant-platform-core/, quant-platform-sdk/, quant-platform-adapters-cn/, quant-platform-ml/, quant-platform-web/, quant-platform-cli/ with pyproject.toml manifests and layered dependency declarations.
• Add quant_platform_*/ import facades at the root so existing import quant_platform_core paths continue to work without modification.
• Add Phase 7 packaging tests covering distribution manifests, layered dependencies, root package discovery, facade imports, and README discoverability.

Conflict Resolution

• Resolved one CHANGELOG.md conflict between this branch (Phase 7) and origin/main (Phase 6 Platform/Runtime alignment) — both sets of entries are retained.

Test Results

All CI checks pass locally:

1326 passed, 35 skipped in 118.89s

[Copilot]

Pull request overview

This PR introduces a Phase 7 “distribution split” for the Quant Platform monorepo by adding separate installable distribution manifests (under packages/) while keeping existing runtime imports (src.*) working via new root-level quant_platform_* facade packages. It also updates docs/changelog and adds tests to validate the packaging layout.

Changes:

• Add six packages/quant_platform_*/pyproject.toml manifests defining layered dependencies and console scripts.
• Add root quant_platform_* facade packages for backwards-compatible imports.
• Add documentation + changelog updates and a new packaging-focused test suite.

Reviewed changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
tests/test_distribution_split.py	Adds tests validating manifests, dependency layering, facade imports, and docs discoverability.
README.md	Updates architecture section to describe runtime vs distribution views and lists split packages.
quant_platform_web/cli.py	Adds console entrypoint module for the web distribution.
quant_platform_web/__init__.py	Adds web distribution facade constants intended to point to frontend/static asset locations.
quant_platform_sdk/__init__.py	Adds SDK facade that re-exports src.sdk surface.
quant_platform_ml/__init__.py	Adds ML facade with group constants.
quant_platform_core/__init__.py	Adds core facade re-exporting src.core and contract version.
quant_platform_cli/backtest.py	Adds quant-backtest console entry point wrapper.
quant_platform_cli/__init__.py	Adds CLI facade exposing main.
quant_platform_adapters_cn/__init__.py	Adds adapters-cn facade with group constants.
pyproject.toml	Expands root setuptools package discovery to include quant_platform_* facades.
packages/README.md	Documents the distribution split and provides build examples.
packages/quant_platform_web/pyproject.toml	Defines the quant-platform-web distribution manifest and included packages.
packages/quant_platform_sdk/pyproject.toml	Defines the quant-platform-sdk distribution manifest.
packages/quant_platform_ml/pyproject.toml	Defines the quant-platform-ml distribution manifest and extras.
packages/quant_platform_core/pyproject.toml	Defines the quant-platform-core distribution manifest and included modules.
packages/quant_platform_cli/pyproject.toml	Defines the quant-platform-cli distribution manifest and scripts.
packages/quant_platform_adapters_cn/pyproject.toml	Defines the quant-platform-adapters-cn distribution manifest.
docs/ROADMAP.md	Marks Phase 7 distribution split as implemented and clarifies packaging boundary.
docs/architecture/open-platform.md	Adds Phase 7 distribution status section and updates phase table.
CHANGELOG.md	Adds Phase 7 changelog entries and test notes.

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