demo: stop claiming backup is the only other copy

The narration said the changed file's "only other copy is in last night's
backup". That is false, and it gives away the argument the demo exists to
make: Zerto has a copy from seconds before the change. That is the whole
point.

d5 now draws the contrast instead of conceding it. Backup has last night,
hours old. Zerto has seconds before the change.

d2 had the same problem in a quieter form, asserting there was "no other
copy of that file anywhere" while Zerto was already protecting the machine.
Cut, since d5 carries the comparison.

Also fixes the pronunciation map that made the voice say "vem". The
replace map takes a phrase and a pronunciation, so {"VM": "vee em"} is
spoken as one run-together word. Expanded to "virtual machine".

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_016yVfC5nvZowoLFnEGWhLGn

demo/narration.md

@@ -24,8 +24,7 @@ full system recovery to get back to the moment before it touched anything.
 Zerto environment.
 
 [d2] The machine is a production Windows server, and Zerto is already protecting it.
-The agent has been asked to change a configuration file on that server, and
-there's no other copy of that file anywhere.
+The agent has been asked to change a configuration file on that server.
 
 [d3] Before it changes anything, it asks Zerto a simple question. Is this machine
 protected, and which protection group is it in?
@@ -34,8 +33,8 @@ protected, and which protection group is it in?
 until Zerto confirms that checkpoint is really there before it goes any further.
 
 [d5] Now the change goes in, and it breaks the file. The version that was there is
-gone, and the only other copy is in last night's backup, which is already hours
-behind.
+gone from the server. Backup has a copy from last night, so that's hours old
+already. Zerto has one from seconds before the change.
 
 [d6] The agent can't just recover on its own. Recovery has to be approved by a
 person, so at this point it stops and asks.

demo/vo/build_narration.py

@@ -11,7 +11,9 @@ beats = re.findall(r"\[([id]\d+)\]\s*(.*?)(?=\n\n|\Z)", SRC.read_text(), re.S)
 lines = {k: " ".join(v.split()) for k, v in beats}
 (SP / "narration.json").write_text(json.dumps(lines, indent=2) + "\n")
 
-REPLACE = {"VM": "vee em", "ad1": "A D one"}   # customer-facing script: few acronyms left
+# Do NOT map an acronym to run-together phonetics: {"VM": "vee em"} is spoken
+# as one word, "vem". Expand it instead, or leave it alone.
+REPLACE = {"VM": "virtual machine"}
 out = {}
 for key, text in lines.items():
     body = {"text": text, "voice_id": VOICE, "language": "en", "speed": SPEED,