Merge origin/master into codex/status-bar-token-metrics

Resolve the agent-loop import conflict by retaining both durable request context and runtime policy context. Refresh the combined session fixtures and regenerate documentation catalogs. Mark PDF artifacts as binary so staged whitespace checks do not parse PDF bytes as text.

.gitattributes

@@ -5,3 +5,5 @@
 # for cmd.exe), add a `*.bat text eol=crlf` override AFTER this line — the
 # in-repo form stays LF; CRLF becomes checkout-time presentation only.
 * text=auto eol=lf
+
+*.pdf binary