runtime.exs: Add SSL config for Exoscale managed PostgreSQL

Exoscale DBaaS (Aiven) requires SSL connections. Added ssl: true
with ssl_opts: [verify: :verify_none] for managed service certs.

L3 migration ran successfully against shorashim database:
- interpretations table with check constraint and indexes
- minority_opinions table with FK index
- teiku_registry table with case_ref index
- Append-only REVOKE ready for shorashim_app role

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

vav_pipeline/config/runtime.exs

@@ -17,7 +17,9 @@ if config_env() == :prod do
 
   config :vav_pipeline, VavPipeline.Repo,
     url: database_url,
-    pool_size: String.to_integer(System.get_env("POOL_SIZE") || "20")
+    pool_size: String.to_integer(System.get_env("POOL_SIZE") || "20"),
+    ssl: true,
+    ssl_opts: [verify: :verify_none]
 
   # L1 mount point — overridable via env
   config :vav_pipeline,