fix(hooks): propagate ephemeral sessionId through embedded tool contexts (#32273)

* fix(plugins): expose ephemeral sessionId in tool contexts for per-conversation isolation

The plugin tool context (`OpenClawPluginToolContext`) and tool hook
context (`PluginHookToolContext`) only provided `sessionKey`, which
is a durable channel identifier that survives /new and /reset.
Plugins like mem0 that need per-conversation isolation (e.g. mapping
Mem0 `run_id`) had no way to distinguish between conversations,
causing session-scoped memories to persist unbounded across resets.

Add `sessionId` (ephemeral UUID regenerated on /new and /reset) to:
- `OpenClawPluginToolContext` (factory context for plugin tools)
- `PluginHookToolContext` (before_tool_call / after_tool_call hooks)
- Internal `HookContext` for tool call wrappers

Thread the value from the run attempt through createOpenClawCodingTools
→ createOpenClawTools → resolvePluginTools and through the tool hook
wrapper.

Closes #31253

Made-with: Cursor

* fix(agents): propagate embedded sessionId through tool hook context

* test(hooks): cover sessionId in embedded tool hook contexts

* docs(changelog): add sessionId hook context follow-up note

* test(hooks): avoid toolCallId collision in after_tool_call e2e

---------

Co-authored-by: SidQin-cyber <sidqin0410@gmail.com>

src/agents/pi-embedded-runner/compact.ts

@@ -370,6 +370,7 @@ export async function compactEmbeddedPiSessionDirect(
       messageProvider: params.messageChannel ?? params.messageProvider,
       agentAccountId: params.agentAccountId,
       sessionKey: sandboxSessionKey,
+      sessionId: params.sessionId,
       groupId: params.groupId,
       groupChannel: params.groupChannel,
       groupSpace: params.groupSpace,

src/agents/pi-embedded-runner/run/attempt.ts

@@ -585,6 +585,7 @@ export async function runEmbeddedAttempt(
           senderE164: params.senderE164,
           senderIsOwner: params.senderIsOwner,
           sessionKey: sandboxSessionKey,
+          sessionId: params.sessionId,
           agentDir,
           workspaceDir: effectiveWorkspace,
           config: params.config,
@@ -858,7 +859,8 @@ export async function runEmbeddedAttempt(
             },
             {
               agentId: sessionAgentId,
-              sessionKey: params.sessionKey,
+              sessionKey: sandboxSessionKey,
+              sessionId: params.sessionId,
               loopDetection: clientToolLoopDetection,
             },
           )
@@ -1186,6 +1188,7 @@ export async function runEmbeddedAttempt(
         enforceFinalTag: params.enforceFinalTag,
         config: params.config,
         sessionKey: sandboxSessionKey,
+        sessionId: params.sessionId,
         agentId: sessionAgentId,
       });