Pure rendering module for ObanPowertools.Doctor findings.

Supports two output formats:

• :human — a sectioned, human-readable text report with severity labels, finding messages, and remediation hints. ANSI color is used when stdout is a TTY and automatically degraded to plain text in CI / non-TTY environments (pipes, redirects, NO_COLOR, TERM=dumb) via IO.ANSI.enabled?/0. (D-01)

• :json — a structured JSON payload for machine consumers. The top-level schema_version field is a stability contract: its value is 1 and any future breaking change to the JSON shape will increment it. This is a CHANGELOG-tracked, semver-aware guarantee consistent with the v1.6 "explicit, inspectable, honest" ethos. (D-03)

JSON Schema (schema_version: 1)

{
  "schema_version": 1,
  "prefix": "public",
  "oban_version_installed": 14,
  "oban_version_db": 14,
  "exit_code": 0,
  "findings": [
    {
      "check": "index_validity",
      "severity": "error",
      "message": "INVALID index …",
      "remediation": "Run: REINDEX INDEX CONCURRENTLY …"
    }
  ]
}