Downgrade MSRV to 1.91.0 (#396)

* Downgrade MSRV to 1.91.0

* Temporarily disable CI

* Raise patch version of Rust

* Revert "Raise patch version of Rust"

This reverts commit 2e35107.

* Reapply "Raise patch version of Rust"

This reverts commit 94fa555.

* Revert "Temporarily disable CI"

This reverts commit 9134915.

* Depend on `managed-lhapdf` with MSRV

Author: cschwan

Cargo.toml

@@ -36,7 +36,7 @@ flate2 = "1.0.22"
 float-cmp = { default-features = false, version = "0.9.0" }
 git-version = "0.3.5"
 itertools = "0.10.1"
-lhapdf = { package = "managed-lhapdf", version = "0.4.0" }
+lhapdf = { package = "managed-lhapdf", version = "0.4.1" }
 lz4_flex = "0.11.6"
 ndarray = { version = "0.15.4" }
 ndarray-npy = { default-features = false, features = ["npz"], version = "0.8.1" }
@@ -68,7 +68,7 @@ edition = "2024"
 keywords = ["high-energy-physics", "physics"]
 license = "GPL-3.0-or-later"
 repository = "https://github.com/NNPDF/pineappl"
-rust-version = "1.94.0"
+rust-version = "1.91.0"
 version = "1.3.3"
 
 [workspace.lints.clippy]

README.md

@@ -6,7 +6,7 @@
   <a href="https://codecov.io/gh/NNPDF/pineappl"><img alt="codecov" src="https://codecov.io/gh/NNPDF/pineappl/branch/master/graph/badge.svg"></a>
   <a href="https://docs.rs/pineappl"><img alt="Documentation" src="https://docs.rs/pineappl/badge.svg"></a>
   <a href="https://crates.io/crates/pineappl"><img alt="crates.io" src="https://img.shields.io/crates/v/pineappl.svg"></a>
-  <a href="docs/installation.md"><img alt="MSRV" src="https://img.shields.io/badge/Rust-1.94+-lightgray.svg"></a>
+  <a href="docs/installation.md"><img alt="MSRV" src="https://img.shields.io/badge/Rust-1.91+-lightgray.svg"></a>
 </p>
 
 # What is PineAPPL?

maintainer/Containerfile

@@ -9,7 +9,7 @@ ENV APPL_IGRID_DIR="/usr/local/src/applgrid/src"
 
 # the last version is the default Rust version used in the container
 # as long as we're using `persist-doctests` in the `Rust` workflow we need nightly as default
-ARG RUST_V="1.80.1 1.94.0 nightly-2026-03-10"
+ARG RUST_V="1.80.1 1.91.1 nightly-2026-03-10"
 
 ENV CARGO_HOME="/usr/local/cargo"
 ENV PATH="/usr/local/cargo/bin:${PATH}"