⬆️ version bump to v4.5

- Update obioptions.Version from "Release 4.4.29" to "/v/ Release v5"
- Update version.txt from 4.29 → .30
(automated by Makefile)

autodoc/docmd/pkg/obidefault/quality.md

@@ -0,0 +1,26 @@
+# Quality Shift and Read/Write Control Module
+
+This Go package (`obidefault`) provides configurable controls over quality score handling in sequence data processing (e.g., FASTQ files). It defines three global variables and corresponding accessor/mutator functions:
+
+- `_Quality_Shift_Input`: Input quality score offset (default: `33`, i.e., Phred+33/Sanger format).
+- `_Quality_Shift_Output`: Output quality score offset (default: `33`), allowing format conversion.
+- `_Read_Qualities`: Boolean flag indicating whether quality scores should be parsed/processed (`true` by default).
+
+## Public API
+
+| Function | Purpose |
+|---------|--------|
+| `SetReadQualitiesShift(shift byte)` | Sets the quality score offset for *input* data (e.g., when reading FASTQ). |
+| `ReadQualitiesShift() byte` | Returns the current input quality offset. |
+| `SetWriteQualitiesShift(shift byte)` | Sets the quality score offset for *output* data (e.g., when writing FASTQ). |
+| `WriteQualitiesShift() byte` | Returns the current output quality offset. |
+| `SetReadQualities(read bool)` | Enables/disables reading/processing of quality scores. |
+| `ReadQualities() bool` | Returns whether qualities are currently being read/used. |
+
+## Semantic Use Cases
+
+- **Format Interoperability**: Allows seamless conversion between Phred+33 (Sanger), Phred+64, or other quality encodings.
+- **Performance Optimization**: Disabling `ReadQualities` skips parsing of quality strings, useful when only sequences are needed.
+- **Centralized Configuration**: Global state enables consistent behavior across modules without passing parameters.
+
+All functions are thread-unsafe by design—intended for initialization before concurrent processing begins.