Add .codacy.yml to disable ESLint (no .eslintrc in web/), PMD (no Java
code), and Prospector; restrict analysis paths to rdagent/ core.
Limit codacy workflow to bandit-only to avoid IndexOutOfBoundsException
at Sarif.scala:185 caused by 14k+ pylint results overwhelming the
SARIF formatter.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>