Clarify MSRV policy

Author: Enet4

CONTRIBUTING.md

@@ -25,16 +25,22 @@ Pull requests are likely to be subjected to constructive and careful reviewing,
 and it may take some time before they are accepted and merged.
 Please do not be discouraged to contribute when not facing the expected outcome,
 or feeling that your work or proposal goes unheard.
-The project is maintained by volunteers outside of work hours.
+The project is primarily maintained by volunteers outside of work hours.
 
 [GitHub issue tracker]: https://github.com/Enet4/dicom-rs/issues
 
 ### Building the project
-As a pure Rust ecosystem,
+
+The DICOM-rs ecosystem is built on Rust ecosystem.
+it may use bindings for integration with other non-Rust libraries
+providing additional capabilities, such as more image encodings,
+but in this case they are automatically fetched and built
+during the standard building process.
+
 Cargo is the main tool for building all crates in DICOM-rs.
 [Rustup] is the recommended way to set up a development environment
 for working with Rust.
-DICOM-rs expects the latest stable toolchain.
+See also the current [Minimum Supported Rust Version (MSRV) policy][msrv].
 
 Currently, all crates are gathered in the same workspace,
 which means that running the command below
@@ -68,8 +74,10 @@ cargo fmt
 ```
 
 [Rustup]: https://rustup.rs
+[msrv]: README.md#Minimum-Supported-Rust-version
 
 ## Discussion and roadmapping
+
 If you have more long-termed ideas about what DICOM-rs should include next,
 please have a look at the [roadmap] and look into existing issues to provide feedback.
 You can also talk about the project at the official [DICOM-rs Zulip organization][zulip].
@@ -82,4 +90,5 @@ please reach out to the project maintainers.
 [zulip]: https://dicom-rs.zulipchat.com
 
 ## Project team and governance
+
 DICOM-rs is currently led by Eduardo Pinho ([**@Enet4**](https://github.com/Enet4), <enet4mikeenet@gmail.com>).

README.md

@@ -101,8 +101,17 @@ no other development dependencies are necessary
 unless certain extensions are included via Cargo features.
 Consult each crate for guidelines on selecting features to suit your needs.
 
-Minimum supported Rust version is 1.72.0 and only applies to the library crates with default features.  
-Binary crates and extra features may require a newer version of Rust.
+### Minimum Supported Rust version
+
+DICOM-rs currently provides partial MSRV guarantees,
+defined by the following rules:
+
+- The minimum supported Rust version required to build _library crates_ with default features is **1.72.0**.
+- For any other cases, namely building the tool/binary crates or including extra features,
+  only the latest stable toolchain is guaranteed to build.
+
+At of 2025-10-04, version 1.80.0 can build the full project,
+though this is not prescriptive and is subject to change over time.
 
 ## Roadmap & Contributing