refactor: remove pi runtime internals

Rename remaining Pi-shaped agent surfaces to OpenClaw agent runtime names, delete obsolete Pi docs and package graph checks, and add the third-party notice for incorporated code.

.github/codeql/codeql-agent-runtime-boundary-critical-quality.yml

@@ -17,7 +17,7 @@ paths:
   - src/acp/control-plane
   - src/agents/command
   - src/agents/cli-runner
-  - src/agents/pi-embedded-runner
+  - src/agents/embedded-agent-runner
   - src/agents/tools
   - src/agents/*completion*.ts
   - src/agents/*transport*.ts

.github/codeql/codeql-mcp-process-tool-boundary-critical-security.yml

@@ -24,14 +24,14 @@ paths:
   - src/agents/openclaw-plugin-tools.ts
   - src/agents/openclaw-tools.runtime.ts
   - src/agents/openclaw-tools.registration.ts
-  - src/agents/pi-tool-definition-adapter.ts
-  - src/agents/pi-tools.abort.ts
-  - src/agents/pi-tools.before-tool-call*.ts
-  - src/agents/pi-tools.host-edit.ts
-  - src/agents/pi-tools-parameter-schema.ts
-  - src/agents/pi-embedded-runner/effective-tool-policy.ts
-  - src/agents/pi-embedded-runner/tool-name-allowlist.ts
-  - src/agents/pi-embedded-runner/tool-schema-runtime.ts
+  - src/agents/agent-tool-definition-adapter.ts
+  - src/agents/agent-tools.abort.ts
+  - src/agents/agent-tools.before-tool-call*.ts
+  - src/agents/agent-tools.host-edit.ts
+  - src/agents/agent-tools-parameter-schema.ts
+  - src/agents/embedded-agent-runner/effective-tool-policy.ts
+  - src/agents/embedded-agent-runner/tool-name-allowlist.ts
+  - src/agents/embedded-agent-runner/tool-schema-runtime.ts
   - src/agents/tools/gateway-tool.ts
   - src/agents/tools/message-tool.ts
   - src/agents/tools/sessions-send-tool.ts