perf(parsers): remplacer tous les subprocesses par des libs in-process

CBR: remplace unrar/unar CLI par le crate `unrar` (bindings libunrar
vendorisé, zéro dépendance système). Supprime XADRegexException, les
forks de processus et les dossiers temporaires.

PDF: remplace pdfinfo + pdftoppm par pdfium-render. Le PDF est ouvert
une seule fois pour obtenir le nombre de pages ET rasteriser la première
page. lopdf reste pour parse_metadata (page count seul).

convert_cbr_to_cbz: reécrit sans subprocess ni dossier temporaire —
les images sont lues en mémoire via unrar puis packées directement en ZIP.

Dockerfile indexer: retire unrar-free, unar, poppler-utils. Télécharge
libpdfium.so depuis bblanchon/pdfium-binaries au build.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Cargo.lock

@@ -369,6 +369,26 @@ dependencies = [
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "console_error_panic_hook"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a06aeb73f470f66dcdbf7223caeebb85984942f22f1adb2a088cf9668146bbbc"
+dependencies = [
+ "cfg-if",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "console_log"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be8aed40e4edbf4d3b4431ab260b63fdc40f5780a4766824329ea0f1eefe3c0f"
+dependencies = [
+ "log",
+ "web-sys",
+]
+
 [[package]]
 name = "const-oid"
 version = "0.9.6"
@@ -1224,6 +1244,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b192c782037fadd9cfa75548310488aabdbf3d2da73885b31bd0abd03351285"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.17"
@@ -1291,6 +1320,16 @@ version = "0.2.182"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6800badb6cb2082ffd7b6a67e6125bb39f18782f793520caee8cb8846be06112"
 
+[[package]]
+name = "libloading"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "754ca22de805bb5744484a5b151a9e1a8e837d5dc232c2d7d8c2e3492edc8b60"
+dependencies = [
+ "cfg-if",
+ "windows-link",
+]
+
 [[package]]
 name = "libm"
 version = "0.2.16"
@@ -1404,6 +1443,12 @@ version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0e7465ac9959cc2b1404e8e2367b43684a6d13790fe23056cc8c6c5a6b7bcb94"
 
+[[package]]
+name = "maybe-owned"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4facc753ae494aeb6e3c22f839b158aebd4f9270f55cd3c79906c45476c47ab4"
+
 [[package]]
 name = "md-5"
 version = "0.10.6"
@@ -1632,11 +1677,12 @@ name = "parsers"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "image",
  "lopdf",
  "natord",
+ "pdfium-render",
  "regex",
- "uuid",
- "walkdir",
+ "unrar",
  "zip 2.4.2",
 ]
 
@@ -1651,6 +1697,32 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "pdfium-render"
+version = "0.8.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6553f6604a52b3203db7b4e9d51eb4dd193cf455af9e56d40cab6575b547b679"
+dependencies = [
+ "bitflags 2.11.0",
+ "bytemuck",
+ "bytes",
+ "chrono",
+ "console_error_panic_hook",
+ "console_log",
+ "image",
+ "itertools",
+ "js-sys",
+ "libloading",
+ "log",
+ "maybe-owned",
+ "once_cell",
+ "utf16string",
+ "vecmath",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+]
+
 [[package]]
 name = "pem-rfc7468"
 version = "0.7.0"
@@ -1678,6 +1750,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "piston-float"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad78bf43dcf80e8f950c92b84f938a0fc7590b7f6866fbcbeca781609c115590"
+
 [[package]]
 name = "pkcs1"
 version = "0.7.5"
@@ -2940,6 +3018,29 @@ version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
 
+[[package]]
+name = "unrar"
+version = "0.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92ec61343a630d2b50d13216dea5125e157d3fc180a7d3f447d22fe146b648fc"
+dependencies = [
+ "bitflags 2.11.0",
+ "regex",
+ "unrar_sys",
+ "widestring",
+]
+
+[[package]]
+name = "unrar_sys"
+version = "0.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b77675b883cfbe6bf41e6b7a5cd6008e0a83ba497de3d96e41a064bbeead765"
+dependencies = [
+ "cc",
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "untrusted"
 version = "0.9.0"
@@ -2958,6 +3059,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "utf16string"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b62a1e85e12d5d712bf47a85f426b73d303e2d00a90de5f3004df3596e9d216"
+dependencies = [
+ "byteorder",
+]
+
 [[package]]
 name = "utf8_iter"
 version = "1.0.4"
@@ -3028,6 +3138,15 @@ version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
 
+[[package]]
+name = "vecmath"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "956ae1e0d85bca567dee1dcf87fb1ca2e792792f66f87dced8381f99cd91156a"
+dependencies = [
+ "piston-float",
+]
+
 [[package]]
 name = "version_check"
 version = "0.9.5"
@@ -3240,6 +3359,28 @@ dependencies = [
  "wasite",
 ]
 
+[[package]]
+name = "widestring"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72069c3113ab32ab29e5584db3c6ec55d416895e60715417b5b883a357c3e471"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
 [[package]]
 name = "winapi-util"
 version = "0.1.11"
@@ -3249,6 +3390,12 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
 [[package]]
 name = "windows-core"
 version = "0.62.2"