Feat/configurable sanitizers and js precision (#32)

* chore: Exclude CLAUDE.md from Cargo.toml

* feat: Add configurable analysis rules and CLI commands for custom sanitizers and terminators

* feat: Enhance resource management and analysis efficiency

- Implemented parallel summary merging in `scan_filesystem` using rayon for improved performance.
- Introduced `GlobalSummaries::merge()` for efficient merging of summaries.
- Optimized file reading and hashing to eliminate redundant I/O operations.
- Added `should_scan_with_hash()` and `upsert_file_with_hash()` methods to streamline file processing.
- Enhanced taint analysis with in-place mutations to reduce memory allocations.
- Updated resource acquisition patterns to exclude false positives for `freopen` and wrapper functions.

* feat: Implement severity downgrade for findings in non-production paths and add source kind inference

* feat: Update versioning information in SECURITY.md for new stable line

* feat: Update categories in Cargo.toml to include parser-implementations and text-processing

* feat: Update dependencies in Cargo.lock for improved compatibility and performance

* feat: Update dependencies in Cargo.lock and Cargo.toml for improved compatibility

src/summary/mod.rs

@@ -209,6 +209,13 @@ impl GlobalSummaries {
             .unwrap_or_default()
     }
 
+    /// Merge another `GlobalSummaries` into this one (for parallel fold/reduce).
+    pub fn merge(&mut self, other: GlobalSummaries) {
+        for (key, summary) in other.by_key {
+            self.insert(key, summary);
+        }
+    }
+
     #[allow(dead_code)]
     pub fn is_empty(&self) -> bool {
         self.by_key.is_empty()