Sync with Veskslop integration: Flextalk profile support, words/echo/highpass, wrapper rename

docs/NOTES.md

@@ -42,8 +42,6 @@ From `msttsl/mstts.inf` (`[TTSReg]`):
   - `{000031CB-3699-551F-AED0-6B4893382D57}`: "Kerry Watson", Pitch 65,
     Speaking Rate 32, Head Size 45, Expression 100, Lowering 40,
     Prominences 17, Age 30, Volume 100.
-    Measured effects per value and the change procedure are in
-    `docs/TTS-DESIGN.md` ("Flextalk profile parameters").
 - Voice data: `EngineData\AE1M08LC.*`, `AE1M11LC.*` (male, 8/11 kHz) and
   `AE2F08LC.*`, `AE2F11LC.*` (female); `.INV` inventory, `.NDX` index,
   `.COD` codebook, plus shared `DICT_CI.*`, `phondef`, `AMPRULES`, `ENDINGS`.
@@ -72,6 +70,10 @@ final file `WatsonUNInstall.dll` is incomplete).
 - Wine reports `err:ole:apartment_add_dll couldn't load in-process dll` when
   the `InprocServer32` path does not exist. Check the file copy first
   (this bit us: a bad `unshield` run created empty directories).
+- Generate registry `.reg` files with `printf`, never `echo`: dash's `echo`
+  interprets `\2` in `...\Watson\2.0\...` as 0x02, corrupting the key so that
+  `wine reg import` is a silent no-op (it still returns 0). The wrapper rejects
+  a generated profile containing control characters.
 - 32-bit engines require a 32-bit prefix (`WINEARCH=win32`).
 - `sudo` on this machine requires a password; installs are manual.