feat: M3 edit + single-step re-run — input versioning, human-modified audit, staged re-run (v0.20.0) (#161)

QA: REJECT@6ed639d (CTO rebase header P1) -> APPROVE@6727e07 (qa-reviews/prautoblogger/2026-06-12-6727e07.md)
CPO guardrails 1-5 verified hard-AC. CEO conditional greenlight 2026-06-12 in chat (QA-APPROVE condition met).

Agent-Session: cto-m3-merge-20260612

includes/providers/class-open-router-provider.php

@@ -78,6 +78,13 @@ class PRAutoBlogger_OpenRouter_Provider implements PRAutoBlogger_LLM_Provider_In
 		// reasoning token cap + completion headroom — lives in the builder.
 		$body = $builder->build_body( $messages, $model, $options );
 
+		// v0.20.0 (B1): stash the outgoing request body so the next
+		// log_api_call() persists it to generation_log.request_json.
+		// Only the BODY is recorded -- Authorization lives exclusively in
+		// build_headers()' return and can never reach the recorder.
+		// Recorded BEFORE dispatch so error/timeout rows carry it too.
+		PRAutoBlogger_Request_Recorder::record( $body );
+
 		// Whether the outgoing request has reasoning enabled — drives the
 		// empty-completion retry decision after parse.
 		$reasoning_active = isset( $body['reasoning'] ) && false !== ( $body['reasoning']['enabled'] ?? true );