fix(openclaw): fix MEMORY.md project query mismatch and add feed botToken support

Three fixes for the OpenClaw plugin:

1. Fix MEMORY.md sync returning empty content
   - syncMemoryToWorkspace() was querying basename(workspaceDir) as the
     project name (e.g. 'workspace'), but observations are stored under
     agent-scoped names like 'openclaw-main'
   - Now queries both the base project and agent-scoped project name
   - Passes EventContext through so the correct project can be derived

2. Add dedicated botToken support for observation feed
   - New optional 'botToken' field in observationFeed config
   - When set, sends observations directly via Telegram Bot API instead
     of routing through the gateway's channel plugin
   - Allows using a separate bot for the observation stream

3. Fix plugin kind for memory slot compatibility
   - Changed plugin kind from 'integration' to 'memory' so OpenClaw
     recognizes it as a valid memory slot plugin
   - Fixes 'memory slot plugin not found' warning when
     plugins.slots.memory = 'claude-mem' is configured

openclaw/openclaw.plugin.json

@@ -2,7 +2,7 @@
   "id": "claude-mem",
   "name": "Claude-Mem (Persistent Memory)",
   "description": "Official OpenClaw plugin for Claude-Mem. Records observations from embedded runner sessions and streams them to messaging channels.",
-  "kind": "integration",
+  "kind": "memory",
   "version": "1.0.0",
   "author": "thedotmack",
   "homepage": "https://claude-mem.com",
@@ -41,6 +41,10 @@
           "to": {
             "type": "string",
             "description": "Target chat/user ID to send observations to"
+          },
+          "botToken": {
+            "type": "string",
+            "description": "Optional dedicated Telegram bot token for the feed (bypasses gateway channel)"
           }
         }
       }