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docs/pre11-batch-d.md

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+# Pre11 Batch D
+
+## Scope
+
+- Rename `src/lz4.c` to `src/decompressor_lz4.c`.
+- Update the source list and current architecture references to the new filename.
+
+## Equivalence
+
+- The pre-rename `lz4.c` blob and renamed `decompressor_lz4.c` blob are identical.
+- Byte comparison confirms the renamed source content is unchanged.
+- Rename detection reports a 100% rename.
+- LZ4 definitions, declarations, descriptor references, and `lz4_finish` call counts are unchanged.
+
+## Behavior and Testing
+
+- This batch changes filenames and documentation only; it makes no behavior changes.
+- No build, QEMU run, feature test, or other test was run.