feat(omo-claude): vendor telemetry component with claude identity

SessionStart daily-active component: omo_claude_daily_active, omo-claude: salt,
platform derived from PRODUCT_NAME, shared PostHog key/host. model/permission_mode
optional in validator. Equivalence + distinctness tests pass; SessionStart smoke
exits 0 with OMO_DISABLE_POSTHOG=1 (no send). Builds; F3 cache boot verified.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/omo-claude/plugin/components/telemetry/hooks/hooks.json

@@ -0,0 +1,15 @@
+{
+	"hooks": {
+		"SessionStart": [
+			{
+				"hooks": [
+					{
+						"type": "command",
+						"command": "node \"${CLAUDE_PLUGIN_ROOT}/dist/cli.js\" hook session-start",
+						"timeout": 5
+					}
+				]
+			}
+		]
+	}
+}