chore: remove bun build artifact, add to gitignore

add orange ASCII banner with version v0.5.3

-(tana-engine): adds TANA ASCII art banner in orange color before help output -(tana-engine): shows version below banner

fix registry-aware version checking, rename to 'te' v0.5.2

-(tana-engine): getImageRef now reads registry from config.json, correctly uses GHCR images when configured -(tana-engine): status command checks Docker accessibility first, shows helpful messages for permission/daemon issues -(tana-engine): renamed program from 'tana-engine' to 'te' in CLI output

feat(docker): add specific error messages for Docker access issues

• Detect 'permission denied' and suggest adding user to docker group
• Detect 'daemon not running' with platform-specific start commands
• Detect 'docker not installed' and link to install docs
• Shows current username in suggested commands

refactor: use 'te' alias in user-facing command suggestions

• Changed all suggested commands from 'tana-engine X' to 'te X'
• Updated monitor path detection to look for 'te' binary
• Monitor cron filtering now handles both old 'tana-engine' and new 'te' entries
• Internal identifiers (log files, task names) remain unchanged

fix(compose): add PENDING_DIR env var for t4 service

• T4 needs PENDING_DIR to write pending uploads to mounted volume
• Without this, it tries to write to container's working directory (read-only)

feat(ledger): run migrations automatically on startup

• Call runMigrations() at service startup instead of via separate script
• Services are now self-initializing - no manual migration step needed
• Tables are created automatically on first run

feat(identity): add auto-migrations on startup

• Run migrations automatically when service starts
• Follows same pattern as notifications service
• Tries multiple paths for Docker and local dev compatibility

fix(engine): read version from package.json v0.5.1

• Removed hardcoded version string from main.ts
• Now reads version dynamically from package.json
• Fixes version mismatch between npm package and compiled binary

chore: bump version to 0.5.0