⬆️ 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/obilog/warning.md

@@ -0,0 +1,30 @@
+# `obilog` Package — Semantic Overview
+
+The `obilog` package provides a lightweight, conditional logging interface for the OBItools4 ecosystem. It wraps `logrus`, a structured logger, to emit warnings only when explicitly allowed by application-wide settings.
+
+## Core Functionality
+
+- **`Warnf(format string, args ...interface{})`**  
+  A convenience wrapper around `logrus.Warnf`, enabling formatted warning messages. It respects a global "silent warnings" toggle defined in `obidefault.SilentWarning()`.
+
+## Design Intent
+
+- **Conditional Warning Output**:  
+  Warnings are suppressed when `obidefault.SilentWarning()` returns `true`, supporting quiet or batch execution modes (e.g., CI pipelines, automated runs).
+
+- **Consistency & Integration**:  
+  Leverages `obidefault` to enforce centralized control over verbosity, aligning logging behavior with higher-level application configuration.
+
+- **Minimal Abstraction**:  
+  Keeps the interface simple and idiomatic, avoiding over-engineering while preserving flexibility for future extensions (e.g., adding `Debugf`, `Infof` wrappers).
+
+## Use Case
+
+Ideal for non-fatal issues in command-line tools or libraries—where warnings should be visible by default but suppressible on demand, without altering core logic.
+
+## Dependencies
+
+- `logrus`: Structured logging backend  
+- `obidefault`: Configuration layer for global behavior (e.g., silence mode)
+
+> **Note**: This package is *not* a full logging subsystem—it’s a targeted, policy-aware warning emitter.