fix(capture): retain Electron observations and HAR resource failures

docs/web-network-captures.md

@@ -126,6 +126,15 @@ process cleanup. Owned decoder diagnostics retain at most 1 MiB across stdout
 and stderr; the collector drops overflow as it arrives, reports the limit
 failure and verifies cleanup. Heap limits alone do not establish aggregate RSS limits.
 
+Observed decoder memory exhaustion returns `resource_constraint`, with the
+selected capture, applicable limits and retained process diagnostics. HAR's
+old-generation heap is fixed; inherited `NODE_OPTIONS` cannot raise it.
+Record selection happens after complete decoding and does not reduce that
+workload. Use a smaller capture exported by its producer or another decoder
+with sufficient capacity, retaining the original for provenance. Subsets do
+not establish complete-capture coverage. Repeating the same workload or
+running provider health diagnostics does not resolve the heap constraint.
+
 Stable regular-file reads reject symlinks, replacement and concurrent changes.
 Private snapshots, declarations and tool configuration are removed before the
 result returns. Cleanup uncertainty retains the selected capture, resource and