deb,quirks: scope deb entries per series with an entry list

One deb block per package cannot express two series needing different
rules. Make pull and deb lists of entries, each with its own series
scope: every matching entry applies, in file order, so a stonking
entry can carry its own dependency rules next to the resolute one.
Thread the series through find_package_directory for the
package_directory lookup, which keeps its deb-then-pull fallback.

src/deb/mod.rs

@@ -337,10 +337,11 @@ pub(crate) fn find_package_directory(
     parent_dir: &Path,
     package: &str,
     version: &str,
+    series: &str,
     ctx: &context::Context,
 ) -> Result<PathBuf, Box<dyn Error>> {
     // Check quirks first for custom package directories
-    let custom_dirs = crate::quirks::get_package_directories(package);
+    let custom_dirs = crate::quirks::get_package_directories(package, series);
     for custom_dir in custom_dirs {
         let package_dir = parent_dir.join(&custom_dir);
         if ctx.exists(&package_dir)? && ctx.exists(&package_dir.join("debian"))? {
@@ -533,9 +534,14 @@ mod tests {
         let ctx = Arc::new(Context::new(crate::context::ContextConfig::Local).unwrap());
 
         // Change directory to the package directory
-        let cwd =
-            crate::deb::find_package_directory(cwd, package, &package_info.stanza.version, &ctx)
-                .expect("Cannot find package directory");
+        let cwd = crate::deb::find_package_directory(
+            cwd,
+            package,
+            &package_info.stanza.version,
+            series,
+            &ctx,
+        )
+        .expect("Cannot find package directory");
         log::debug!("Package directory: {}", cwd.display());
 
         log::info!("Starting binary package build...");