docs: drop process labels and refresh the architecture and manual pages

Assisted-by: GLM 5.3

docs/man/gasm-debug.1

@@ -1,4 +1,4 @@
-.TH GASM-DEBUG 1 "2026-09-19" "gasm 0.33.0" "User Commands"
+.TH GASM-DEBUG 1 "2026-09-19" "gasm" "User Commands"
 .SH NAME
 gasm-debug \- interactive source-level debugger for JIT-assembled functions
 .SH SYNOPSIS
@@ -98,10 +98,12 @@ Run REPL commands from a file (one per line) and exit; - reads stdin.
 .TP
 .B \-timeout \fIduration\fR
 Kill the debuggee after this duration (e.g. 30s); for headless --script
-runs.
+runs; a timeout exits 3.
 .SH EXIT STATUS
-Exits 0 when the scripted session completes and 1 when the debuggee
-crashes or a check fails; the debugger is Linux-only.
+Exits 0 when the scripted session completes, 1 when the debuggee crashes
+or a check fails, and 3 when
+.B \-\-timeout
+kills the debuggee; the debugger is Linux-only.
 .SH EXAMPLES
 .nf
 gasm debug \-\-func name k.s