Add circular network template and flexible XPS styling

[hang-jin]

What changed

• adds a publication-style circular directed weighted network template with editable Origin output, preview, contracts, examples, gallery asset, and acceptance checks
• adds phase-level runtime diagnostics and a documented 4–5 minute healthy end-to-end expectation
• makes XPS visual styling flexible while preserving source-data and axis/fill safety contracts
• updates bilingual README, quick start, gallery, palette, release-boundary, and skill documentation
• expands public-release, workflow, renderer, preview, progress, and XPS regression coverage

Why

This release addresses user reports about slow runs without diagnostic visibility, adds the requested circular network visualization, and removes overly rigid XPS appearance constraints so users can choose template defaults, approximate a confirmed reference, or provide exact colors, line widths, transparency, page size, and legend settings.

Validation

• full test suite: 649 passed, 1 skipped
• strict public release audit: passed (635 files, 0 errors)
• real Origin 2024b circular-network validation: OPJU + PNG + PDF + TIF + object readback; visual QA approved
• real Origin 2024b XPS smoke, adaptive-style, and fixed-C1s-style validation: OPJU + PNG + PDF + TIF + object readback
• local installed EditaPlot skill synchronized and checked for parity

Safety

• source CSV data remains unmodified
• fixed C1s axis and stable fill contracts remain enforced
• no unverified LabTalk fill mode is introduced