big update in share links

migrations/postgres/0012_share_link_tokens.sql

@@ -1 +1,2 @@
-ALTER TABLE resource_share_links ADD COLUMN token TEXT;
+-- Legacy migration retained for numbering only. Plaintext share tokens are not stored.
+SELECT 1;

migrations/postgres/0026_share_link_sessions.sql

@@ -1,4 +1,3 @@
-UPDATE resource_share_links SET token = NULL;
 CREATE TABLE resource_share_sessions (
  session_token_hash TEXT PRIMARY KEY,
  share_token_hash TEXT NOT NULL REFERENCES resource_share_links(token_hash) ON DELETE CASCADE,

migrations/postgres/0027_share_link_labels.sql

@@ -0,0 +1 @@
+ALTER TABLE resource_share_links ADD COLUMN label TEXT;