fix(import): pair _ASCII.TXT reports on the SFM server side too

The series3-watcher v1.5.0 fix taught the WATCHER to look for BW
ACH's _ASCII.TXT report alongside each binary.  But the SFM
SERVER's import endpoint only knew about the legacy <binary>.TXT
naming when building its TXT lookup table.

Effect: even though the watcher correctly shipped both files in
the multipart POST (and logged "+ <name>_ASCII.TXT attached"),
the server's reports dict was keyed on the wrong name, so
report_bytes resolved to None for every event.  Without the
report, save_imported_bw fell back to broken-codec peak values
and no project info — exactly the same symptom as before the
watcher fix landed, just for a different reason.

Fix: when stripping the ".TXT" suffix, also recognise the
"_ASCII" trailer and reconstruct the binary's filename by
converting the last "_" back to ".".  Register the report under
BOTH possible binary names so the subsequent lookup matches
whichever convention the operator's BW installation uses.

  ACH convention (Blastware ACH):
    binary T003L2G6.0E0H  + report T003L2G6_0E0H_ASCII.TXT  ✅
  Manual export (operator clicks Save As Text in BW):
    binary M529LK44.AB0   + report M529LK44.AB0.TXT          ✅
  Both for same event (e.g. ACH + operator manual save):
    register under both names; binary lookup wins             ✅

Smoke-tested against the four real fixture filenames in the
project archive.  Full SFM suite still 62 pass.

For the user's situation: pull, restart, and the NEXT re-forward
pass (after deleting watcher state file again if needed) will
hit this code path, parse the report correctly, apply the
overlay onto the Event, and the upsert path will land
authoritative peak values + project info in the DB.

sfm/server.py

@@ -1659,8 +1659,33 @@ async def db_import_blastware_file(
             continue
 
         if name.lower().endswith(".txt"):
-            # Strip the ".txt" suffix to get the binary's filename.
+            # Pair the report back to its binary.  BW writes ASCII
-            reports[name[:-4].lower()] = content
+            # reports under two conventions:
+            #
+            #   1. ACH convention (Blastware's official Auto Call Home):
+            #        binary:  M529LK44.AB0
+            #        report:  M529LK44_AB0_ASCII.TXT
+            #      (replaces the "." with "_", appends "_ASCII.TXT")
+            #
+            #   2. Manual-export convention (operator clicks Save As Text
+            #      in BW's UI):
+            #        binary:  M529LK44.AB0
+            #        report:  M529LK44.AB0.TXT
+            #      (literal binary filename + ".TXT" suffix)
+            #
+            # We register BOTH possible binary names as keys so the
+            # subsequent lookup matches whichever convention was used.
+            stripped = name[:-4]            # remove ".TXT"
+            # ACH convention: strip "_ASCII" and convert the last "_"
+            # back to "." to recover the binary's filename.
+            if stripped.lower().endswith("_ascii"):
+                inner = stripped[:-6]       # remove "_ASCII"
+                under = inner.rfind("_")
+                if under >= 0:
+                    ach_binary = inner[:under] + "." + inner[under + 1 :]
+                    reports[ach_binary.lower()] = content
+            # Legacy convention: the stripped name IS the binary's name.
+            reports[stripped.lower()] = content
         else:
             binaries.append((name, content))