mapper: make LLM context output adaptive

[wesleysimplicio]

What changed

• Enable the economical LLM-facing output path by default for orient and handoff.
• Select JSON or TOON adaptively from the estimated token cost.
• Preserve explicit --json, --for-llm toon, and SIMPLICIO_TOON=0 overrides.
• Bump the synchronized package version to 0.26.19.

Validation

• python scripts/check-version-sync.py
• python -m compileall -q simplicio_mapper
• python -m unittest discover -s tests/python -p 'test_orient.py'
• python -m unittest tests.python.test_cli_toon_asolaria.ForLlmToonWiringTest
• git diff --check

The adaptive default chooses JSON for small payloads and TOON when it materially reduces the context size.