Added Cap::DATA_EXFIL and taint fp and fn fixes on real repos (#59)

* feat: Enhance data exfiltration detection with source sensitivity gating for cookies and headers

* feat: Implement cross-file data exfiltration detection with parameter-specific gate filters

* feat: Add calibration tests and refine DATA_EXFIL severity scoring logic

* feat: Introduce per-detector configuration for data exfiltration suppression

* feat: Enhance DATA_EXFIL findings with destination field tracking in diagnostics and SARIF output

* feat: Add tainted body and URL handling for data exfiltration detection

* feat: Add integration tests and fixtures for DATA_EXFIL and SSRF detection in Go

* feat: Add Java integration tests and fixtures for DATA_EXFIL detection across multiple HTTP clients

* feat: Add synthetic externals handling for closure-captured variables in SSA

* feat: Implement closure-based suppression for resource leak findings

* feat: Add regression guards for shell-injection and taint propagation in for-of destructure patterns

* feat: Implement constructor cap narrowing for data exfiltration detection in HTTP request builders

* feat: Add gated sinks for data exfiltration detection in C and C++ using curl_easy_setopt

* feat: Implement DATA_EXFIL cap parity for backwards analysis and add integration tests

* feat: Add data exfiltration sinks for various languages and enhance documentation

* refactor: Simplify formatting and improve readability in various files

* refactor: Improve readability by simplifying conditional statements and adding clippy linting

* docs: Update CHANGELOG and comments for data exfiltration features and configuration

* docs: Clarify configuration instructions for data exfiltration trusted destinations

* docs: Enhance comments for evidence routing logic in data exfiltration

src/state/transfer.rs

@@ -635,6 +635,19 @@ impl DefaultTransfer<'_> {
     fn apply_assignment(&self, _node_idx: NodeIndex, info: &NodeInfo, state: &mut ProductState) {
         // Ownership transfer: if `defines` reassigns a tracked resource
         // variable from a `uses` variable, transfer the lifecycle.
+        //
+        // Skip when the RHS is a function or lambda literal: storing a
+        // closure into a property (`ws.onclose = () => { ... }`,
+        // `obj.handler = function(){...}`) does not move ownership of the
+        // resources the closure body references — those identifiers appear
+        // in `info.taint.uses` only because `def_use` walks the literal's
+        // body, not because the assignment itself reads them.  Without this
+        // gate, the first OPEN-tracked capture inside the closure body gets
+        // marked MOVED and the property's symbol becomes the new OPEN
+        // owner, which then surfaces as a spurious leak on the property.
+        if info.rhs_is_function_literal {
+            return;
+        }
         if let Some(ref def) = info.taint.defines
             && let Some(def_sym) = self.get_sym(info, def)
         {