feat: add OBS recording engine and validation probe

clipbin-obs starts the pinned libobs on a dedicated thread, opens exactly the
bundled plugin allowlist, and records official capture sources through one
hardware encoder into keyframe-aligned Matroska segments. Status reaches
Recording only once the source has a picture and the segment grows on disk.

clipbin-probe lists and verifies hardware encoders and records from a real
capture source, printing status, health and segment events for validation.

Cargo.lock

@@ -496,6 +496,26 @@ dependencies = [
  "syn 2.0.119",
 ]
 
+[[package]]
+name = "bindgen"
+version = "0.72.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "993776b509cfb49c750f11b8f07a46fa23e0a1386ffc01fb1e7d343efc387895"
+dependencies = [
+ "bitflags 2.13.2",
+ "cexpr",
+ "clang-sys",
+ "itertools 0.13.0",
+ "log",
+ "prettyplease",
+ "proc-macro2",
+ "quote",
+ "regex",
+ "rustc-hash 2.1.3",
+ "shlex 1.3.0",
+ "syn 2.0.119",
+]
+
 [[package]]
 name = "bit-set"
 version = "0.8.0"
@@ -851,6 +871,22 @@ dependencies = [
  "gpui",
 ]
 
+[[package]]
+name = "clipbin-obs"
+version = "0.1.0"
+dependencies = [
+ "clipbin-core",
+ "libobs",
+]
+
+[[package]]
+name = "clipbin-probe"
+version = "0.1.0"
+dependencies = [
+ "clipbin-core",
+ "clipbin-obs",
+]
+
 [[package]]
 name = "cocoa"
 version = "0.25.0"
@@ -2084,7 +2120,7 @@ dependencies = [
  "as-raw-xcb-connection",
  "ashpd 0.11.1",
  "async-task",
- "bindgen",
+ "bindgen 0.71.1",
  "blade-graphics",
  "blade-macros",
  "blade-util",
@@ -2236,7 +2272,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "05cb8912ae17371725132d2b7eec6797a255accc95d58ee5c1134b529810f14b"
 dependencies = [
  "anyhow",
- "bindgen",
+ "bindgen 0.71.1",
  "core-foundation 0.10.0",
  "core-video",
  "ctor",
@@ -2940,6 +2976,16 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
 
+[[package]]
+name = "libobs"
+version = "5.0.1+32.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c8956a7534b34783f962fd8f9b16383bcf3a2b535629fd68628b205e849bd17"
+dependencies = [
+ "bindgen 0.72.1",
+ "pkg-config",
+]
+
 [[package]]
 name = "libredox"
 version = "0.1.25"