Add log ingestion tool for loading signature logs into SQLite

- Parse signature messages from log files extracting app info, device
  details, and feature flags (autofill, touchID, offline login, etc.)
- Support both plain .log and gzip compressed .log.gz files
- File discovery by date range (YYYY/mm/dd directory structure)
- Batch inserts for performance with large files (10GB+ per day)
- Index on session_id and version for efficient queries
- Extensible parser architecture via MessageParser trait
- Parallel file processing for multi-day ingestion

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "log_ingest"
+version = "0.0.1"
+authors = ["Alexandr Mansurov"]
+edition = "2024"
+
+[dependencies]
+clap = { version = "4.5.42", features = ["derive"] }
+rusqlite = { version = "0.35", features = ["bundled"] }
+chrono = "0.4"
+regex = "1"
+flate2 = "1"
+anyhow = "1"
+rayon = "1"
+crossbeam-channel = "0.5"