Fix OB1 Agent Memory OpenClaw tool schemas

[justfinethanku]

Summary

• fixes the OpenClaw plugin schemas for openbrain_recall and openbrain_writeback so Claude/OpenClaw sees explicit tool parameters instead of patternProperties-only records
• adds a reusable schema module and npm run schema:check regression check
• bumps the plugin package/docs/release notes to 0.1.5 and keeps the verified tarball install path current

Verification

• npm run schema:check
• npm run build
• npm pack --dry-run
• openclaw --profile nbj-ob1-agent-memory-dryrun plugins inspect nbj-ob1-agent-memory --runtime --json
• ClawHub dry-run publish for @natebjones/ob1-agent-memory@0.1.5
• live ClawHub publish succeeded: @natebjones/ob1-agent-memory@0.1.5
• downloaded live tarball and installed it into a clean OpenClaw profile; all seven openbrain_* tools loaded with no diagnostics

Notes

• Full native smoke against the real Agent Memory API was not run locally because no usable credentialed OpenClaw profile is present on this machine.
• The clawhub: OpenClaw resolver still hits the known archive metadata fallback issue, so the documented tarball install path remains the reliable install path for OpenClaw 2026.5.2.

[justfinethanku]

Review checkpoint before merge:

• Diff is scoped to the OB1 Agent Memory OpenClaw package/release files.
• openbrain_recall and openbrain_writeback now use explicit TypeBox object schemas instead of the patternProperties-only record schema that caused {} tool calls.
• Client defaults now preserve configured workspace/project precedence while allowing tool-provided project_id when no project is configured.
• Schema regression coverage was added via npm run schema:check.
• Verified locally after merging origin/main: npm run schema:check passes and npm run build passes.
• GitHub checks are green.

No blocking review findings from this pass.