feat(syslog): lines beside the readings: around an anomaly, in get_anomaly, and marked on host and SNMP charts (#6002)

get_anomaly's circumstances gain the host's or SNMP device's syslog
warnings and worse (mcp_events / mcp_resource_events). An anomaly row opens
"Syslog around it", read only when opened. A shared Chart.js plugin
(chart-marks.js) draws a dashed line at each syslog error on the host
metrics charts and an SNMP device's charts, with a line saying how many.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

plugins/syslog/__init__.py

@@ -40,6 +40,16 @@ def register_mcp_tools(register) -> None:
     register_tools(register)
 
 
+async def mcp_events(db, host_id: str, host_name: str, since, until) -> list[dict]:
+    from .mcp_tools import mcp_events as events
+    return await events(db, host_id, host_name, since, until)
+
+
+async def mcp_resource_events(db, source: str, resource: str, since, until) -> list[dict]:
+    from .mcp_tools import mcp_resource_events as events
+    return await events(db, source, resource, since, until)
+
+
 def get_alert_metrics() -> dict[str, list[str]]:
     """A pattern's count is named for the pattern (lines_matching_<key>), so
     the list is empty here and the rule form offers the counts recorded so far."""