docs: architecture.md workspace operations list missing workspace init and workspace configure

[codeforester]

The "Workspace Operations" list shows six commands (projects list, workspace status, workspace check, workspace doctor, workspace clone, workspace pull) but omits basectl workspace init (shipped 1.2.0) and basectl workspace configure (shipped 1.3.0). Both are documented in the cli/bash/commands/basectl/README.md and CHANGELOG.md. Users consulting architecture.md to understand the workspace command surface will not find these two operations.

Fix: Add basectl workspace init and basectl workspace configure to the workspace operations list with brief descriptions matching the README.md entries.

File: docs/architecture.md