docs: reports contract names only the collector's two counting calls under its session id; INSTALL.md qualifies the title claim (#157)

Files changed:
- CHANGES.md
- INSTALL.md
- VERSION
- reports/CONTRACT.md

reports/CONTRACT.md

@@ -50,8 +50,10 @@ session trace, the chronology and transcripts, which may hold page content and t
 removed by the collector; the rest is the reader's to check before a bundle leaves the machine.
 Nothing uploads it: the channel is the user's choice.
 
-The collector's own `wikitool` calls run under the session id `bugreport-<stamp>`, so a
-`reports/telemetry/bugreport-*` directory is that run's trace and belongs to no session of yours.
+The collector's two counting `wikitool` calls (`instructions verify`, `docs verify`) run under the
+session id `bugreport-<stamp>`; its budget-exempt ones inherit the caller's. A
+`reports/telemetry/bugreport-*` directory is therefore that run's trace and belongs to no session
+of yours.
 
 ## Retention