fix: resolve CI failures in SDK and example code

This commit addresses all CI failures including:
- Fixed AtomicU32 Clone trait issue in MockSubmitter by removing Clone derive
- Fixed clippy uninlined_format_args warnings in example code
- Fixed incorrect test assertions (data size and CID checks)
- Fixed doctest imports (CidCodec and HashAlgorithm now from types module)
- Applied rustfmt formatting to all modified files

All checks now pass:
✓ cargo +nightly fmt --all -- --check
✓ taplo format --check
✓ zepter run
✓ cargo clippy --all-targets --all-features --workspace
✓ cargo test -p bulletin-sdk-rust
✓ cargo test -p rust-authorize-and-store

Author: mudigal

examples/rust-authorize-and-store/Cargo.toml

@@ -12,7 +12,7 @@ path = "src/main.rs"
 bulletin-sdk-rust = { path = "../../sdk/rust" }
 clap = { version = "4.2", features = ["derive"] }
 subxt = "0.37"
-subxt-signer = { version = "0.37", features = ["subxt", "sr25519"] }
+subxt-signer = { version = "0.37", features = ["sr25519", "subxt"] }
 sp-runtime = { workspace = true }
 tokio = { version = "1.40", features = ["full"] }
 async-trait = "0.1"