build(rust): Upgrade bindgen to 0.72.1 for Fedora packaging

Fixes #1608 - Update bindgen to enable Fedora Linux packaging.

- Upgrade bindgen from 0.64.0 to 0.72.1
- Fix deprecated CargoCallbacks API
- Replace (?i) regex flags with character classes for compatibility

The inline case-insensitivity flag (?i) causes bindgen 0.72.1 to
silently produce empty bindings. This fix uses [Dd][Tt][Vv][Cc][Cc]
character classes to match both lowercase (dtvcc_*) and uppercase
(DTVCC_*) type/function names.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: cfsmp3

src/rust/Cargo.lock

@@ -39,7 +39,7 @@ rsmpeg = { git = "https://github.com/CCExtractor/rsmpeg.git", default-features =
 rsmpeg = { git = "https://github.com/CCExtractor/rsmpeg.git", default-features = false, features = ["ffmpeg7", "link_system_ffmpeg"], optional = true }
 
 [build-dependencies]
-bindgen = "0.64.0"
+bindgen = "0.72.1"
 pkg-config = "0.3.32"
 
 [dev-dependencies]

src/rust/Cargo.toml

@@ -5,7 +5,8 @@ use std::path::PathBuf;
 fn main() {
     let mut allowlist_functions = Vec::new();
     allowlist_functions.extend_from_slice(&[
-        ".*(?i)_?dtvcc_.*",
+        // Match both lowercase (dtvcc_*) and uppercase (DTVCC_*) patterns
+        ".*_?[Dd][Tt][Vv][Cc][Cc]_.*",
         "get_visible_.*",
         "get_fts",
         "printdata",
@@ -44,7 +45,8 @@ fn main() {
 
     let mut allowlist_types = Vec::new();
     allowlist_types.extend_from_slice(&[
-        ".*(?i)_?dtvcc_.*",
+        // Match both lowercase (dtvcc_*) and uppercase (DTVCC_*) patterns
+        ".*_?[Dd][Tt][Vv][Cc][Cc]_.*",
         "encoder_ctx",
         "lib_cc_decode",
         "ccx_demuxer",
@@ -118,7 +120,7 @@ fn main() {
 
     // Tell cargo to invalidate the built crate whenever any of the
     // included header files changed.
-    builder = builder.parse_callbacks(Box::new(bindgen::CargoCallbacks));
+    builder = builder.parse_callbacks(Box::new(bindgen::CargoCallbacks::new()));
 
     for type_name in allowlist_types {
         builder = builder.allowlist_type(type_name);