⬆️ 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/obiiter/speed.md

@@ -0,0 +1,31 @@
+# `Speed` Functionality Description
+
+The provided Go code defines a method and helper function to add **real-time progress tracking** to biosequence iterators in the OBITools4 framework.
+
+## Core Features
+
+- **Non-intrusive progress bar**:  
+  The `Speed()` method wraps an existing iterator and displays a visual progress indicator on stderr, using the [`progressbar`](https://github.com/schollz/progressbar) library.
+
+- **Conditional rendering**:  
+  The progress bar is only shown when:
+    - `--no-progressbar` flag is *not* set (via `obidefault.ProgressBar()`),
+    - stderr is connected to a terminal (`os.ModeCharDevice`),
+    - stdout is *not* piped (to avoid interfering with file output).
+
+- **Batch-aware counting**:  
+  Progress is updated per batch (`batch.Len()`), not item-by-item, for efficiency and smoother UI updates (throttled to ≥100ms).
+
+- **Paired-end support**:  
+  If the input iterator is paired (`IsPaired()`), this property is preserved in the returned iterator.
+
+- **Pipeable wrapper**:  
+  `SpeedPipe()` enables integration into functional pipelines (e.g., `.Map(...).Filter(...)`) by returning a `Pipeable` function.
+
+## Implementation Highlights
+
+- Uses goroutines to decouple iteration and progress updates.
+- Automatically closes the output iterator when input ends (`WaitAndClose()`).
+- Prints a final newline to stderr upon completion.
+
+This utility enhances user experience during long-running sequence processing (e.g., FASTQ parsing, alignment), without affecting correctness or performance in non-interactive contexts.