* Add npm/PyPI package publishing access management (config + drift detection)
Declare expected npm org membership, per-package maintainers and trusted
publishers, and PyPI project rosters in src/config/packageAccess.ts, with
npm/pypi identity fields on members in users.ts.
Deliberately outside the Pulumi resource graph: npm governance writes
require an interactive 2FA challenge since August 2026 (read endpoints
still work with a granular access token), and PyPI has no management API
at all. Drift against the live npm registry is detected read-only by
scripts/check-package-drift.ts (weekly via package-drift.yml, no-op when
the NPM_READ_TOKEN secret is absent), which emits a remediation plan of
npm CLI commands for a maintainer to run in one 2FA-approved session.
PyPI procedures are documented as a manual runbook in the README.
* Encode all slashes when escaping package names in registry URLs
Fixes the CodeQL finding: String.replace with a string pattern only
replaces the first occurrence. Use a shared helper with a global regex,
following the npm CLI convention (keep '@' literal, encode every '/').
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Co-authored-by: Claude <noreply@anthropic.com>
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