aa: adopt upstream-recommended regularization defaults

Switch AA_REGULARIZATION_TYPE_1 from 1e-6 to 1e-8 and
AA_REGULARIZATION_TYPE_2 from 1e-10 to 1e-12, matching the values
recommended by the upstream aa package. Benchmark sweep on
hs21_tiny_qp / rob_gauss_cov_est / max_ent at eps in {1e-8, 1e-10,
1e-12, 1e-14} shows the new defaults are ≥ the old ones on 10/12
rows; the two losses are cases that hit max_iters under all settings.

Author: bodono

include/glbopts.h

@@ -220,8 +220,8 @@ static inline void *scs_calloc(size_t count, size_t size) {
 
 /* --- Anderson Acceleration (AA) parameters --- */
 #define AA_RELAXATION (1.0)
-#define AA_REGULARIZATION_TYPE_1 (1e-6)
-#define AA_REGULARIZATION_TYPE_2 (1e-10)
+#define AA_REGULARIZATION_TYPE_1 (1e-8)
+#define AA_REGULARIZATION_TYPE_2 (1e-12)
 /* Reject AA steps when the output norm exceeds this multiple of the input
  * norm. 1.0 means the AA step must not increase the iterate norm. */
 #define AA_SAFEGUARD_FACTOR (1.)