v1.4.0

New Components

spans: Add spans query command to query spans from Dash0 (#51) Supports table, CSV, and OTLP JSON output formats with filtering, time range selection, and pagination.
spans: Add spans send command to send spans to Dash0 via OTLP (#51) Supports span kind, status, duration, trace/span ID (auto-generated or explicit), parent span, span links, resource/span/scope attributes, and custom instrumentation scope.
traces: Add traces get command to retrieve all spans in a trace from Dash0 (#51) Displays spans in table, JSON (OTLP/JSON), or CSV format. Table output shows timestamp, duration, trace ID, span ID, parent ID, span name, status, service name, and span links. Supports --follow-span-links to recursively fetch traces linked through span links.

logs: Color-code severity levels in logs query table output (#46) Severity levels (FATAL, ERROR, WARN, DEBUG, TRACE) are now color-coded when output is a terminal. A new global --color flag (env: DASH0_COLOR) controls color output: semantic (default) or none.
output: Add --skip-header flag to suppress the header row in tabular output formats (#50) Available on all asset list commands (table and wide formats), config profiles list and logs query (table and CSV formats).