refactor(extract): rename ts_node_stack.h to extract_node_stack.h

Pure rename — no logic change. The header is consumed only by
internal/cbm/extract_*.c, depends on tree_sitter/api.h, and is purpose-
built for AST traversal during extraction. The "extract_" prefix makes
the scope explicit and keeps the file naming consistent with its
neighbours (extract_calls.c, extract_imports.c, ...).

- internal/cbm/ts_node_stack.h -> internal/cbm/extract_node_stack.h
- Include guard CBM_TS_NODE_STACK_H -> CBM_EXTRACT_NODE_STACK_H
- Header banner comment updated
- 9 call sites in internal/cbm/extract_*.c updated to the new path

Full suite: 2824 passed, 0 failed.

internal/cbm/extract_calls.c

@@ -4,7 +4,7 @@
 #include "lang_specs.h"
 #include "extract_unified.h"
 #include "foundation/constants.h"
-#include "ts_node_stack.h"
+#include "extract_node_stack.h"
 #include "tree_sitter/api.h" // TSNode, ts_node_*
 #include <stdint.h>          // uint32_t
 #include <string.h>

internal/cbm/extract_channels.c

@@ -24,7 +24,7 @@
 #include "arena.h"
 #include "helpers.h"
 #include "foundation/constants.h"
-#include "ts_node_stack.h"
+#include "extract_node_stack.h"
 #include "tree_sitter/api.h"
 #include <stdint.h>
 #include <string.h>

internal/cbm/extract_defs.c

@@ -3,7 +3,7 @@
 #include "helpers.h"
 #include "lang_specs.h"
 #include "foundation/constants.h"
-#include "ts_node_stack.h"
+#include "extract_node_stack.h"
 #include "simhash/minhash.h"
 #include "semantic/ast_profile.h"
 #include "tree_sitter/api.h" // TSNode, ts_node_*

internal/cbm/extract_env_accesses.c

@@ -4,7 +4,7 @@
 #include "lang_specs.h"
 #include "extract_unified.h"
 #include "foundation/constants.h"
-#include "ts_node_stack.h"
+#include "extract_node_stack.h"
 #include "tree_sitter/api.h" // TSNode, ts_node_*
 #include <stdint.h>          // uint32_t
 #include <string.h>

internal/cbm/extract_imports.c

@@ -4,7 +4,7 @@
 #include "lang_specs.h" // CBMLangSpec, CBMEmbeddedLangSpec, cbm_lang_spec, cbm_ts_language
 #include "tree_sitter/api.h" // TSNode, ts_node_*
 #include "foundation/constants.h"
-#include "ts_node_stack.h"
+#include "extract_node_stack.h"
 #include <stdint.h> // uint32_t
 #include <string.h>
 #include <ctype.h>

internal/cbm/extract_node_stack.h

@@ -1,5 +1,5 @@
 /*
- * ts_node_stack.h — Growable TSNode stack for AST traversal.
+ * extract_node_stack.h — Growable TSNode stack for AST traversal.
  *
  * Replaces fixed-size TSNode stack[] arrays that silently drop AST subtrees
  * when the stack overflows (GitHub issue #199).
@@ -9,8 +9,8 @@
  * Initial capacity matches the previous fixed caps so small files allocate
  * no extra memory.
  */
-#ifndef CBM_TS_NODE_STACK_H
-#define CBM_TS_NODE_STACK_H
+#ifndef CBM_EXTRACT_NODE_STACK_H
+#define CBM_EXTRACT_NODE_STACK_H
 
 #include "arena.h"
 #include "tree_sitter/api.h"
@@ -50,4 +50,4 @@ static inline TSNode ts_nstack_pop(TSNodeStack *s) {
     return s->items[--s->count];
 }
 
-#endif /* CBM_TS_NODE_STACK_H */
+#endif /* CBM_EXTRACT_NODE_STACK_H */

internal/cbm/extract_semantic.c

@@ -5,7 +5,7 @@
 #include "extract_unified.h"
 #include "tree_sitter/api.h" // TSNode, ts_node_*
 #include "foundation/constants.h"
-#include "ts_node_stack.h"
+#include "extract_node_stack.h"
 
 enum { MAX_EXCEPTION_NAME_LEN = 100, LAST_IDX = 1 };
 #include <stdint.h> // uint32_t

internal/cbm/extract_type_assigns.c

@@ -5,7 +5,7 @@
 #include "extract_unified.h"
 #include "tree_sitter/api.h" // TSNode, ts_node_*
 #include "foundation/constants.h"
-#include "ts_node_stack.h"
+#include "extract_node_stack.h"
 #include <stdint.h> // uint32_t
 #include <string.h>
 #include <ctype.h>

internal/cbm/extract_type_refs.c

@@ -5,7 +5,7 @@
 #include "extract_unified.h"
 #include "tree_sitter/api.h" // TSNode, ts_node_*
 #include "foundation/constants.h"
-#include "ts_node_stack.h"
+#include "extract_node_stack.h"
 
 enum { MIN_TYPE_LEN = 1 };
 

internal/cbm/extract_usages.c

@@ -4,7 +4,7 @@
 #include "extract_unified.h"
 #include "tree_sitter/api.h" // TSNode, ts_node_*
 #include "foundation/constants.h"
-#include "ts_node_stack.h"
+#include "extract_node_stack.h"
 
 enum { MAX_PARENT_DEPTH = 10, LAST_IDX = 1 };
 #include <stdint.h> // uint32_t