Release 0.5.0

• feat: enable npm provenance and add @cascadeflow/ml to publish workflow (b744fd3)
• fix: update @cascadeflow/ml dependency and TestPyPI permissions (495e4ec)
• chore: update pnpm lockfile for @cascadeflow/ml@0.4.0 (deaf408)
• fix: build @cascadeflow/ml before core (dependency order) (2df439e)
• fix: skip prepublishOnly script for n8n package (already built) (6c7be62)
• fix: make publish workflow not fail on already-published packages (58da107)
• fix: replace pepy.tech downloads badge with shields.io PyPI badge (f53f2bb)
• feat: add PePy total downloads badge (24842b5)
• fix: remove deployment tracking from publish workflow (5538418)
• fix: restore environment tracking to show green deployments (454ccea)
• docs: fix broken documentation links and clean up outdated references (8526cc5)
• docs: remove outdated version references and future roadmap items (e8915d9)
• OpenRouter provider (#62) (4320b4d)
• fix: typescript types and linting (#63) (b036829)
• fix: resolve n8n package workspace dependency issue (v0.4.1) (#64) (7617993)
• Release v0.5.0: Multi-instance support, TypeScript parity, and bug fixes (780ebcb)