v0.1.9: --json output mode

Release the --json arc:
  - build_report() seam between Transform and Load (5e5e70e)
  - --json flag for programmatic consumers (7d0dcfa)
  - JSON honors requested scope without auto-fallback (4db06e4)
  - cost_usd rounded to cents at the report boundary (ddfbcdb)
  - README schema reference + docstring (ccb1a1b)

The schema is documented and stable within schema_version=1. CreatureView
and other consumers can shell out to `codestrain --json` and read the
dict from stdout.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: Margarita <ermachenkova.rita@mail.ru>

Author: e-margot

codestrain_cli.py

@@ -18,7 +18,7 @@
 from pathlib import Path
 
 # Keep in sync with pyproject.toml [project].version at every release.
-__version__ = "0.1.8"
+__version__ = "0.1.9"
 
 
 # ── ANSI Colors ──────────────────────────────────────────────────────────────

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "codestrain"
-version = "0.1.8"
+version = "0.1.9"
 description = "Your AI coding recovery score, from the terminal."
 requires-python = ">=3.9"
 readme = "README.md"