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internal/store/migrations/0002_drop_api_keys.sql

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+-- Drop the machine-credential table.
+--
+-- API keys were removed: the runtime API is public by design and the admin API is
+-- for people, so there is no machine caller left to authenticate. The table is
+-- dropped rather than left behind, because an unused table holding SHA-256 digests
+-- of credentials that no longer authenticate anything is a liability with no
+-- upside, and its presence in the schema implies a capability that no longer exists.
+--
+-- The rows go with it. That is destructive by definition, which is why this is a
+-- migration rather than a code change: it happens once, in order, and is recorded in
+-- schema_migrations so a restore from an older backup is visible rather than silent.
+--
+-- A backup taken before this migration still contains the table and its rows. The
+-- credentials in it do not work against any version of this service, so restoring
+-- one is harmless.
+
+DROP INDEX IF EXISTS idx_api_keys_hash;
+DROP INDEX IF EXISTS idx_api_keys_live;
+DROP TABLE IF EXISTS api_keys;