Add lean hypothesis startup round with joint evidence review

config/investigation.startup-batch.toml

@@ -0,0 +1,15 @@
+[investigation]
+lean_loop = true
+lean_protocol = 2
+# Temporary experiment: no periodic consolidation.
+lean_checkpoint_steps = 0
+bootstrap_json_framing = true
+
+# Versioned native object shapes for nonempty bootstrap findings.
+bootstrap_framing_version = 3
+
+# Deterministic normalization and bounded format-only repair.
+response_recovery_version = 1
+
+# New revisions only: lean initial queries, followed by one joint review.
+startup_batch_review = true