refactor: update dependencies and remove unused code

- Added new dependencies: `adler2`, `crc32fast`, `flate2`, `miniz_oxide`, and `libredox`.
- Updated existing dependencies: `tokio-rustls` to version 0.26.4 and `filetime` to version 0.2.27.
- Removed the `backup.rs` file as it is no longer needed.
- Introduced tests for configuration and credential management.
- Enhanced the `identity` module to generate W3C compliant DID documents.

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

core/container/Cargo.toml

@@ -8,7 +8,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_yaml = "0.9"
 serde_json = "1.0"
 tokio = { version = "1", features = ["full"] }
-reqwest = { version = "0.11", features = ["json"] }
+reqwest = { version = "0.11", default-features = false, features = ["json", "rustls-tls"] }
 thiserror = "1.0"
 anyhow = "1.0"
 async-trait = "0.1"