fix: Gitea labels as body text, demote parse log to debug

Gitea API expects label IDs (integers), not names. Append label names
to the issue body instead. Also lower "Parsing file" log from info to
debug to reduce noise.

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

compliance-graph/src/parsers/registry.rs

@@ -3,7 +3,7 @@ use std::path::Path;
 
 use compliance_core::error::CoreError;
 use compliance_core::traits::graph_builder::{LanguageParser, ParseOutput};
-use tracing::info;
+use tracing::{debug, info};
 
 use super::javascript::JavaScriptParser;
 use super::python::PythonParser;
@@ -65,7 +65,7 @@ impl ParserRegistry {
         };
 
         let parser = &self.parsers[parser_idx];
-        info!(
+        debug!(
             file = %file_path.display(),
             language = parser.language(),
             "Parsing file"