L3 Oral Tradition: PostgreSQL persistence layer for interpretations, minority opinions, teiku

Devarim 17:9 — v'darashta v'higidu lekha et d'var hamishpat.
The inquiry requires that what is found is RECORDED.

- Ecto Repo with graceful degradation (maybe_add_repo, like other engines)
- Migration: interpretations, minority_opinions, teiku_registry tables
  - Append-only enforcement via REVOKE UPDATE/DELETE
  - Includes eish_zarah fields: coupling_trace, grounding_type, challenge_sequence
- Ecto schemas: Interpretation, MinorityOpinion, TeikuRecord
  - Changeset validations: status inclusion, panel_size > 0, grounding_type enum
  - TeikuRecord.resolve_changeset restricts updates to resolved_at/resolution only
- L3.Store bridge module: record, query, count operations
- L3 tests tagged @moduletag :l3, excluded by default (no local PostgreSQL)
  - Enable with: SHORASHIM_L3=1 mix test --include l3
- All 76 existing Elixir tests pass, 195 Prolog tests pass, 33 Haskell tests pass

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

vav_pipeline/mix.exs

@@ -7,7 +7,8 @@ defmodule VavPipeline.MixProject do
       version: "0.1.0",
       elixir: "~> 1.16.1",
       start_permanent: Mix.env() == :prod,
-      deps: deps()
+      deps: deps(),
+      aliases: aliases()
     ]
   end
 
@@ -18,11 +19,24 @@ defmodule VavPipeline.MixProject do
     ]
   end
 
+  defp aliases do
+    [
+      setup: ["deps.get", "ecto.setup"],
+      "ecto.setup": ["ecto.create", "ecto.migrate"],
+      "ecto.reset": ["ecto.drop", "ecto.setup"],
+      test: ["test"]
+    ]
+  end
+
   # Construction spec §1.5 — exact version pins
   defp deps do
     [
       {:jason, "~> 1.4.1"},
-      {:sanhedrin, path: "../sanhedrin", manager: :rebar3}
+      {:sanhedrin, path: "../sanhedrin", manager: :rebar3},
+      # L3 — Oral Tradition (PostgreSQL append-only)
+      # Architecture §3.7, Construction §1.5
+      {:ecto_sql, "~> 3.11.1"},
+      {:postgrex, "~> 0.17.4"}
     ]
   end
 end