fixup! tapdb+universe: add global and uni specific fed sync config

tapdb/sqlc/migrations/000007_universe.up.sql

@@ -105,13 +105,13 @@ CREATE TABLE IF NOT EXISTS federation_global_sync_config (
 -- This table contains universe (asset/asset group) specific federation sync
 -- configuration.
 CREATE TABLE IF NOT EXISTS federation_uni_sync_config (
-    -- This field contains the byte serialized ID of the asset that this
-    -- configuration applies to.
-    asset_id  BLOB, -- CHECK(length(asset_id) = 32) NULL,
+    -- This field contains the byte serialized ID of the asset to which this
+    -- configuration is applicable
+    asset_id  BLOB CHECK(length(asset_id) = 32) NULL,
 
-    -- This field contains the byte serialized group key public key of the asset
-    -- group that this configuration applies to.
-    group_key BLOB, -- CHECK(LENGTH(group_key) = 32) NULL,
+    -- This field contains the byte serialized compressed group key public key
+    -- of the asset group to which this configuration is applicable.
+    group_key BLOB CHECK(LENGTH(group_key) = 33) NULL,
 
     -- This field is an enum representing the proof type stored in the given
     -- universe.
@@ -125,12 +125,12 @@ CREATE TABLE IF NOT EXISTS federation_uni_sync_config (
     -- should accept remote proof export via federation sync.
     allow_sync_export BOOLEAN NOT NULL,
 
---     -- Both the asset ID and group key cannot be null at the same time.
---     CHECK (
---         (asset_id IS NOT NULL AND group_key IS NULL) OR
---         (asset_id IS NULL AND group_key IS NOT NULL)
---     ),
+    -- Both the asset ID and group key cannot be null at the same time.
+    CHECK (
+        (asset_id IS NOT NULL AND group_key IS NULL) OR
+        (asset_id IS NULL AND group_key IS NOT NULL)
+    ),
 
-    -- The primary key is the universe identifier: the asset ID and group key.
+    -- Ensure that the universe identifier fields form a unique tuple.
     UNIQUE (asset_id, group_key, proof_type)
 );