fix: verify android elf build ids

[ovitrif]

Fixes #130

Implements the bitkit-core producer portion of synonymdev/bitkit-android#1105. Companion PRs: synonymdev/ldk-node#98, synonymdev/vss-rust-client-ffi#19, pubky/paykit-rs#124, and synonymdev/bitkit-android#1106.

Description

• links every published Android ABI with a SHA-1 GNU build ID while preserving the existing 16 KB page-size linker flags
• requires build-ID presence before stripping, verifies strip survival, and compares each final AAR library with its unstripped symbol counterpart
• requires full DWARF metadata in the native debug-symbol archive and makes publication depend on artifact validation
• bumps the cross-platform package to 0.4.4 and regenerates Android, iOS, Python, and Swift artifacts

Preview

N/A — build and publishing changes only.

QA Notes

Manual Tests

• Published 0.4.4 to the task-local Maven repository and consumed its AAR and native-debug-symbols classifier in the Bitkit Android release build.
• Independently inspected all packaged and symbol libraries with NDK llvm-readelf -n.

Automated Checks

• cargo fmt --check
• cargo clippy --all-targets --all-features (passes with existing warnings)
• cargo test --all-features -- --skip modules::blocktank — 399 passed, 25 ignored, 48 filtered
• ./gradlew build
• ./gradlew validatePublishedNativeArtifacts publishToMavenLocal
• shellcheck -e SC2115 build_android.sh
• GNU build-ID presence, strip survival, full DWARF, and packaged-to-symbol parity passed for armeabi-v7a, arm64-v8a, x86, and x86_64