Add a "modified" flag to the panic report metadata

If the source code doesn't match the commit, the reported version will
end with ".modified".

Cargo.lock

@@ -4052,9 +4052,9 @@ checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 
 [[package]]
 name = "vergen"
-version = "5.1.4"
+version = "5.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "575b693376dacf6a9825ab3e61a033cf0e94040e620fca8447b055ef8ce82d2b"
+checksum = "adf0b57f76a4f7e9673db1e7ffa4541d215ae8336fee45f5c1378bdeb22a0314"
 dependencies = [
  "anyhow",
  "cfg-if 1.0.0",

zebrad/build.rs

@@ -29,6 +29,10 @@ fn main() {
 
     *config.git_mut().sha_kind_mut() = ShaKind::Short;
     *config.git_mut().semver_kind_mut() = SemverKind::Lightweight;
+    // git typically uses "-dirty", but we change that so:
+    // - we're explicit and direct about source code state
+    // - it matches the SemVer 2.0 format, using dot separators
+    *config.git_mut().semver_dirty_mut() = Some(".modified");
 
     // Disable env vars we aren't using right now
     *config.cargo_mut().features_mut() = false;