feat(upstream): snapshot a6f47abd, REST VedAstro path, and 116-technique truth layer

Advance the one-way import to git commit a6f47abd with consultation keypath golden, switch official VedAstro comparison to the REST Calculate bridge, and receive the 25 new registry entries behind research_only_blocked.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/run_all.py

@@ -688,7 +688,8 @@ def t99():
 @test("Package version is consistent")
 def t100():
     from jyotish_vedic import __version__
-    assert __version__ == '6.9.14'
+    # 原值＝6.9.14；新值＝6.9.15。原因＝任务 1 新增 skill 版本目录。
+    assert __version__ == '6.9.15'
 
 # ── v6.9.11 Precision gate tests ──
 @test("Transit uses Swiss Ephemeris")