feat: optional findings telemetry — emit runs+findings to a gadfly-reports store

After each review the binary POSTs the run + its heuristically-extracted findings to GADFLY_FINDINGS_URL (off unless set). Advisory: any error only goes to stderr — never touches stdout, the exit code, or the review. stdlib net/http only (no new deps). entrypoint.sh derives GADFLY_REPO/GADFLY_PR and passes through GADFLY_FINDINGS_URL/GADFLY_FINDINGS_TOKEN. Also renames store references from the old 'docket' name to 'gadfly-reports'.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

examples/adversarial-review.yml

@@ -91,6 +91,13 @@ jobs:
           GADFLY_PROVIDER: ${{ vars.GADFLY_PROVIDER }}
           GADFLY_BASE_URL: ${{ vars.GADFLY_BASE_URL }}
           GADFLY_MODELS: ${{ vars.GADFLY_MODELS }}
+          # --- Findings telemetry (optional; OFF by default) ------------------
+          # Set GADFLY_FINDINGS_URL to a gadfly-reports store base URL to POST each run +
+          # its findings for model-quality tracking. Advisory only: failures are
+          # logged to stderr and never affect the review. Add a bearer token if
+          # the store requires auth. (GADFLY_REPO / GADFLY_PR are derived for you.)
+          # GADFLY_FINDINGS_URL: ${{ vars.GADFLY_FINDINGS_URL }}
+          # GADFLY_FINDINGS_TOKEN: ${{ secrets.GADFLY_FINDINGS_TOKEN }}
           EVENT_NAME: ${{ github.event_name }}
           PR: ${{ github.event.pull_request.number || github.event.issue.number || github.event.inputs.pr_number }}
           PR_BRANCH: ${{ github.head_ref }}