V1.0: Class 1 fax — real-world 4-page send to external number confirmed

Core features:
- Class 1 T.30 protocol: full send/receive implementation
- HDLC: DLE-stuffing, FCS strip, USR5637 bit-reversal handling
- T.4 MH encoder/decoder (1728px A4 standard)
- Document pipeline: PDF (Ghostscript), PNG, TIFF input
- Width clamping: US Letter 1734px → 1728px fax standard
- Cover page: CJK rasterization (TW/CN/JP/EN), TIFF + HTML output
- OCR verification: Tesseract 5 with eng+chi_tra, CJK space-tolerant
- API server (axum): health, send, jobs, cover, retry, cancel
- Background worker: auto-poll queue, speed fallback, retry policy
- Modem detection, pool management

Real-world test results (2026-07-23):
- V90 → 25153038: 4 pages, V.17 12000 bps, 2:33 ✅
- USR5637 → 25153038: 4 pages, V.17 12000 bps, 2:26 ✅
- Both faxes confirmed received on remote machine

Tested: loopback (100% pixel match), multi-page, all input formats,
cover pages, OCR verify, API endpoints, worker processing.
13 unit tests pass, 0 new clippy warnings.

deployment/com.telfax.server.plist

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>Label</key>
+    <string>com.telfax.server</string>
+    
+    <key>ProgramArguments</key>
+    <array>
+        <string>/usr/local/bin/telfax</string>
+        <string>serve</string>
+        <string>--config</string>
+        <string>/usr/local/etc/telfax/config.toml</string>
+    </array>
+    
+    <key>RunAtLoad</key>
+    <true/>
+    
+    <key>KeepAlive</key>
+    <true/>
+    
+    <key>StandardOutPath</key>
+    <string>/usr/local/var/log/telfax/telfax.log</string>
+    
+    <key>StandardErrorPath</key>
+    <string>/usr/local/var/log/telfax/telfax-error.log</string>
+    
+    <key>EnvironmentVariables</key>
+    <dict>
+        <key>RUST_LOG</key>
+        <string>info</string>
+        <key>TELFAX_CONFIG_PATH</key>
+        <string>/usr/local/etc/telfax/config.toml</string>
+    </dict>
+    
+    <key>WorkingDirectory</key>
+    <string>/usr/local/var/lib/telfax</string>
+    
+    <key>UserName</key>
+    <string>root</string>
+    
+    <key>GroupName</key>
+    <string>wheel</string>
+    
+    <key>SoftResourceLimits</key>
+    <dict>
+        <key>NumberOfFiles</key>
+        <integer>65536</integer>
+    </dict>
+    
+    <key>HardResourceLimits</key>
+    <dict>
+        <key>NumberOfFiles</key>
+        <integer>65536</integer>
+    </dict>
+</dict>
+</plist>