fix: address PR review — bugs, dead code, error handling

Critical fixes:
- Smart Home: invalidate entity state query after toggle mutation
- Beszel live mode: use 5s refetchInterval instead of global 30s
- Fix unit test assertions for 5-arg setQueryCacheAsync signature
- Fix serialize/deserialize mismatch: JSON.parse on read (matches persister's JSON.stringify)
- Remove render-time setActiveQueryCacheBoardId race (keep only useEffect)

Error handling:
- Log persistence errors instead of swallowing with catch(() => {})
- Log QueryCacheHydration failures with ErrorWithMetadata
- Beszel: log partial failures (system details, container stats)

Dead code removal:
- Remove dead queryKey from all 39 request handlers + lib files
- Delete unused Redis APIs: createCacheChannel, createChannelWithLatestAndEvents,
  createChannelEventHistory, history-channel.ts
- Remove stale createCacheChannel mock from docker test

Cleanup:
- Seed system-resources chart from initial query data (no empty start)
- Remove redundant refetchOnWindowFocus/refetchOnReconnect from BoardProvider

packages/request-handler/src/firewall.ts

@@ -18,7 +18,6 @@ export const firewallCpuRequestHandler = createIntegrationRequestHandler<
     const integrationInstance = await createIntegrationAsync(integration);
     return integrationInstance.getFirewallCpuAsync();
   },
-  queryKey: "firewallCpuSummary",
 });
 
 export const firewallMemoryRequestHandler = createIntegrationRequestHandler<
@@ -30,7 +29,6 @@ export const firewallMemoryRequestHandler = createIntegrationRequestHandler<
     const integrationInstance = await createIntegrationAsync(integration);
     return await integrationInstance.getFirewallMemoryAsync();
   },
-  queryKey: "firewallMemorySummary",
 });
 
 export const firewallInterfacesRequestHandler = createIntegrationRequestHandler<
@@ -42,7 +40,6 @@ export const firewallInterfacesRequestHandler = createIntegrationRequestHandler<
     const integrationInstance = await createIntegrationAsync(integration);
     return await integrationInstance.getFirewallInterfacesAsync();
   },
-  queryKey: "firewallInterfacesSummary",
 });
 
 export const firewallVersionRequestHandler = createIntegrationRequestHandler<
@@ -54,5 +51,4 @@ export const firewallVersionRequestHandler = createIntegrationRequestHandler<
     const integrationInstance = await createIntegrationAsync(integration);
     return await integrationInstance.getFirewallVersionAsync();
   },
-  queryKey: "firewallVersionSummary",
 });