⬆️ 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/obiformats/ncbitaxdump_readtar.md

@@ -0,0 +1,31 @@
+## NCBI Taxonomy Archive Support in `obiformats`
+
+This Go package provides utilities for handling **NCBI Taxonomy dumps archived as `.tar` files**.
+
+### Core Functionalities
+
+1. **Archive Validation (`IsNCBITarTaxDump`)**  
+   - Checks whether a given `.tar` file contains all required NCBI Taxonomy dump files: `citations.dmp`, `division.dmp`, `gencode.dmp`, `names.dmp`, `delnodes.dmp`, `gc.prt`, `merged.dmp`, and `nodes.dmp`.  
+   - Returns a boolean indicating if the archive is a complete NCBI tax dump.
+
+2. **Taxonomy Loading (`LoadNCBITarTaxDump`)**  
+   - Parses the `.tar` archive and extracts key files to build a `Taxonomy` object.  
+   - Steps include:
+     - **Nodes**: Loads taxonomic hierarchy (`nodes.dmp`) via `loadNodeTable`.
+     - **Names**: Parses scientific and common names (`names.dmp`) via `loadNameTable`, with an option to load *only scientific names* (`onlysn`).
+     - **Merged Taxa**: Integrates taxonomic aliases from `merged.dmp`, using `loadMergedTable`.
+   - Sets the root taxon to NCBI’s default (`taxid = 1`, i.e., *root*).
+
+3. **Integration with Other Modules**  
+   - Uses `obiutils.Ropen`, `TarFileReader` for robust file handling.
+   - Leverages `obitax.Taxonomy`, a structured representation of taxonomic data.
+
+### Key Parameters
+- `onlysn`: If true, only scientific names are loaded (reduces memory usage).
+- `seqAsTaxa`: Reserved for future use; currently unused.
+
+### Logging & Error Handling  
+- Uses `logrus` to log loading progress and counts.
+- Returns descriptive errors if required files or the root taxon are missing.
+
+> **Note**: Designed for efficient, standards-compliant ingestion of NCBI Taxonomy data in bioinformatics pipelines.