feat: stream ldk-node logs to android logcat

[ovitrif]

Description

This PR adds the ldk-node logs to the android logcat and refactors to centralize the logging concerns and unify the log message format.

The logging format was adopted from ldk-node (source) with some small tweaks so it plays nice with both android log levels and the ldk-node ones.

note to reviewer : please merge only AFTER #449 .

Preview

QA Notes

Run in emulator, check logcat, expect ldk-node logs lines alongside the app logs in chronological order.

[Copilot]

Pull Request Overview

This PR implements streaming of ldk-node logs to Android logcat while centralizing and unifying the logging architecture. The changes create a consistent log format that adopts ldk-node's logging pattern while making it compatible with Android log levels.

• Refactors the Logger from an object to a more flexible class-based architecture with dependency injection
• Implements LdkLogWriter to bridge ldk-node logs to Android logcat with proper log level mapping
• Centralizes log formatting and file management for both Bitkit and LDK logs

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
Logger.kt	Complete refactor from object to class-based architecture with unified log formatting and LdkLogWriter implementation
LightningService.kt	Updates to use new LdkLogWriter instead of filesystem logging and improves error handling patterns
LogsRepo.kt	Moves LogSource enum to Logger.kt for centralized logging concerns
DateTime.kt	Adds utility function for UTC date formatters and LOG_LINE pattern for consistent timestamp formatting
Env.kt	Reorganizes ldkLogLevel declaration and fixes initialization order issue
ServiceQueue.kt	Adds LOG queue for dedicated logging thread management

[ovitrif]

Really like the copilot summaries, though I wonder if it's able to generate them so nicely described if we no longer spend time to manually write relevant summary in the PR description. Worth a try though, it could save some valuable time... who knows 🤷🏻‍♂️.

[jvsena42]

Really like the copilot summaries, though I wonder if it's able to generate them so nicely described if we no longer spend time to manually write relevant summary in the PR description. Worth a try though, it could save some valuable time... who knows 🤷🏻‍♂️.

I guess it is done like this in blocktank repo

[ovitrif]

@jvsena42 This PR should be ready for review now 🙏🏻

[jvsena42]

Tested emulator -> check app and LDK Logs