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/symex/transfer.rs

@@ -1012,6 +1012,8 @@ mod tests {
             exception_edges: vec![],
             field_interner: crate::ssa::ir::FieldInterner::default(),
             field_writes: std::collections::HashMap::new(),
+
+            synthetic_externals: std::collections::HashSet::new(),
         }
     }
 
@@ -1591,6 +1593,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
         let ctx = make_summary_ctx(&gs);
@@ -1659,6 +1662,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
         let ctx = make_summary_ctx(&gs);
@@ -1727,6 +1731,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
         let ctx = make_summary_ctx(&gs);
@@ -1790,6 +1795,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
         let ctx = make_summary_ctx(&gs);
@@ -1853,6 +1859,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
         let ctx = make_summary_ctx(&gs);
@@ -2050,6 +2057,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
 
@@ -2128,6 +2136,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
 
@@ -2207,6 +2216,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
         // Second "send", in ns B, also with same arity → ambiguous bare-name
@@ -2236,6 +2246,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
         // Also register the type-qualified name so Attempt 1 can find it
@@ -2265,6 +2276,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
 
@@ -2343,6 +2355,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
 
@@ -2423,6 +2436,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
         insert_java_summary(
@@ -2451,6 +2465,7 @@ mod tests {
                 field_points_to: Default::default(),
                 return_path_facts: smallvec::SmallVec::new(),
                 typed_call_receivers: vec![],
+                param_to_gate_filters: vec![],
             },
         );
         // No "HttpClient.send" summary registered, disambiguation has 0 exact matches