feat(openclaw): support /hooks/agent endpoint and multi-endpoint detection

Add OpenClawEndpointKind type to distinguish between /hooks/wake,
/hooks/agent, open_responses, and generic endpoints. Build appropriate
payloads per endpoint kind with optional sessionKey inclusion.
Refactor webhook execution to use endpoint-aware payload construction.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/adapters/openclaw/src/index.ts

@@ -11,7 +11,7 @@ Use when:
 - You run an OpenClaw agent remotely and wake it over HTTP.
 - You want selectable transport:
   - \`sse\` for streaming execution in one Paperclip run.
-  - \`webhook\` for wake-style callbacks (including /hooks/wake compatibility).
+  - \`webhook\` for wake-style callbacks (\`/hooks/wake\`, \`/hooks/agent\`, or compatibility webhooks).
 
 Don't use when:
 - You need local CLI execution inside Paperclip (use claude_local/codex_local/opencode_local/process).
@@ -25,6 +25,7 @@ Core fields:
 - webhookAuthHeader (string, optional): Authorization header value if your endpoint requires auth
 - payloadTemplate (object, optional): additional JSON payload fields merged into each wake payload
 - paperclipApiUrl (string, optional): absolute http(s) Paperclip base URL to advertise to OpenClaw as \`PAPERCLIP_API_URL\`
+- hookIncludeSessionKey (boolean, optional): when true, include derived \`sessionKey\` in \`/hooks/agent\` webhook payloads (default false)
 
 Session routing fields:
 - sessionKeyStrategy (string, optional): \`fixed\` (default), \`issue\`, or \`run\`