feat: simplify multi-account WeChat message routing

feat: support multi-account WeChat and generate release notes from commits

fix: sort manifest keys for integration validation

fix: align manifest and hacs metadata with validation rules

chore: refresh upstream references and dependency baselines

ci: add integration validation workflows

fix: correct HACS release archive structure

Update manifest.json

fix: add zip_release and filename to hacs.json, correct zip structure

Update manifest.json

fix(ci): align workflow with reference, reset version to 2026.03.9

Update manifest.json

fix: set content_in_root=true for HACS compatibility

Update manifest.json

fix(ci): correct zip structure for HACS