fix: resolve clippy errors (expect_used, manual strip_prefix)

Replace expect() calls with let-else returns in SBOM download, use
strip_prefix() instead of manual slicing in extract_base_url, and
suppress too_many_arguments on server function.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

compliance-agent/src/pipeline/orchestrator.rs

@@ -914,27 +914,15 @@ impl PipelineOrchestrator {
 /// e.g. "https://gitea.example.com/owner/repo.git" → "https://gitea.example.com"
 /// e.g. "ssh://git@gitea.example.com:22/owner/repo.git" → "https://gitea.example.com"
 fn extract_base_url(git_url: &str) -> Option<String> {
-    if git_url.starts_with("http://") || git_url.starts_with("https://") {
-        // https://host/path... → take scheme + host
-        let without_scheme = if git_url.starts_with("https://") {
-            &git_url[8..]
-        } else {
-            &git_url[7..]
-        };
-        let host = without_scheme.split('/').next()?;
-        let scheme = if git_url.starts_with("https://") {
-            "https"
-        } else {
-            "http"
-        };
-        Some(format!("{scheme}://{host}"))
-    } else if git_url.starts_with("ssh://") {
+    if let Some(rest) = git_url.strip_prefix("https://") {
+        let host = rest.split('/').next()?;
+        Some(format!("https://{host}"))
+    } else if let Some(rest) = git_url.strip_prefix("http://") {
+        let host = rest.split('/').next()?;
+        Some(format!("http://{host}"))
+    } else if let Some(rest) = git_url.strip_prefix("ssh://") {
         // ssh://git@host:port/path → extract host
-        let after_scheme = &git_url[6..];
-        let after_at = after_scheme
-            .find('@')
-            .map(|i| &after_scheme[i + 1..])
-            .unwrap_or(after_scheme);
+        let after_at = rest.find('@').map(|i| &rest[i + 1..]).unwrap_or(rest);
         let host = after_at.split(&[':', '/'][..]).next()?;
         Some(format!("https://{host}"))
     } else if let Some(at_pos) = git_url.find('@') {