feat(protocol): implement v0.14.0 SUB 5A protocol rewrite with enhanced chunk handling and new helpers

test: add regression tests for v0.14.x SUB 5A protocol fixes
refactor(logging): change warning logs to debug for less verbosity in write_blastware_file

minimateplus/blastware_file.py

@@ -639,7 +639,7 @@ def write_blastware_file(
         strt = b"STRT" + b"\xff\xfe" + key4 + bytes(14) + bytes([rectime & 0xFF])
         probe_skip = 7 + 21
 
-    log.warning(
+    log.debug(
         "write_blastware_file: strt_pos_stripped=%d  probe_skip=%d  "
         "probe_data_len=%d  strt_hex=%s",
         strt_pos_stripped if strt_pos_stripped >= 0 else -1,
@@ -708,8 +708,8 @@ def write_blastware_file(
             skip = 12   # sample chunks
 
         contribution = _frame_body_bytes(frame, skip)
-        log.warning("write_blastware_file: fi=%d skip=%d raw_data=%d contribution=%d",
-                    fi, skip, len(frame.data), len(contribution))
+        log.debug("write_blastware_file: fi=%d skip=%d raw_data=%d contribution=%d",
+                  fi, skip, len(frame.data), len(contribution))
         all_bytes.extend(contribution)
 
     # Terminator contributes its content, which ends with the 26-byte footer.
@@ -717,7 +717,7 @@ def write_blastware_file(
     # one shorter than chunk frames' 5-byte inner header.  Confirmed 2026-04-21.
     if term_frame is not None:
         term_contribution = _frame_body_bytes(term_frame, 11)
-        log.warning(
+        log.debug(
             "write_blastware_file: term_frame data_len=%d  skip=11  "
             "contribution_len=%d  first8=%s",
             len(term_frame.data),
@@ -726,7 +726,7 @@ def write_blastware_file(
         )
         all_bytes.extend(term_contribution)
 
-    log.warning(
+    log.debug(
         "write_blastware_file: all_bytes total=%d  last28=%s",
         len(all_bytes),
         bytes(all_bytes[-28:]).hex() if len(all_bytes) >= 28 else bytes(all_bytes).hex(),
@@ -760,7 +760,7 @@ def write_blastware_file(
     if footer_pos >= 0:
         body   = bytes(all_bytes[:footer_pos])
         footer = bytes(all_bytes[footer_pos:footer_pos + 26])
-        log.warning(
+        log.debug(
             "write_blastware_file: real 0e 08 footer at all_bytes[%d]; "
             "truncating %d post-footer bytes",
             footer_pos, len(all_bytes) - footer_pos - 26,