Source workspace path pattern

[kitlangton]

Summary

• Add the wrk prefix pattern to the WorkspaceID runtime schema.
• Remove the remaining workspace path parameter special-case from public.ts.
• Extend path parameter OpenAPI coverage for the workspace removal route.

Testing

• ./packages/sdk/js/script/build.ts
• bun dev generate > /tmp/opencode-openapi-workspace-path-pattern.json
• bun test --timeout 5000 test/server/httpapi-query-schema-drift.test.ts
• bunx prettier --check src/control-plane/schema.ts src/server/routes/instance/httpapi/public.ts specs/openapi-translation-cleanup.md test/server/httpapi-query-schema-drift.test.ts
• bunx oxlint packages/opencode/src/control-plane/schema.ts packages/opencode/src/server/routes/instance/httpapi/public.ts packages/opencode/test/server/httpapi-query-schema-drift.test.ts
• bun typecheck
• pre-push bun turbo typecheck

Restacked from #26624 onto dev after parent merge.

Stack

• Source HTTP API ID path patterns #26623
• Source workspace path pattern #26624
• Source workspace path pattern #26632 👈 current