Add enterprise docs structure and include pending core maintenance updates.

docs/access.md

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+# Access And Permissions
+
+## Roles
+
+- Maintainer: merge authority, release authority, incident ownership.
+- Reviewer: approves pull requests and validates architecture/security impact.
+- Contributor: proposes changes through pull requests.
+- Consumer: integrates published package versions in downstream applications.
+
+## Least-Privilege Model
+
+- Limit maintainer privileges to required release and incident responders.
+- Use reviewer role for routine code review and documentation updates.
+- Restrict package publishing credentials to release maintainers.
+
+## Approval Workflow
+
+1. Contributor opens pull request.
+2. Reviewer validates tests, documentation, and risk impact.
+3. Maintainer approves merge for high-risk or release-impacting changes.
+4. Release maintainer publishes approved release artifacts.
+
+## Periodic Access Review
+
+1. Review maintainer and publisher access quarterly.
+2. Remove inactive accounts and obsolete credentials.
+3. Confirm access ownership in repository settings and package feed controls.
+
+## Emergency Access
+
+- Temporary elevated access requires a tracked incident issue.
+- Remove temporary access immediately after incident closure.