jiff for table definition added

common/proto/table_definition.proto

@@ -120,11 +120,16 @@ message ColumnDefinition {
   // Logical column type. Supported values (case-insensitive):
   //   TEXT
   //   BOOLEAN
-  //   TIMESTAMPTZ
+  //   INSTANT (absolute timestamp, displayed in the viewer timezone)
+  //   USER_DATETIME (local input resolved in the user's timezone)
+  //   RAW_DATETIME (timezone-free civil datetime)
+  //   TIME (timezone-free time of day)
   //   MONEY (= unconstrained NUMERIC; currency comes from the table)
   //   INT
   //   BIGINT
   //   DATE
+  //   DURATION
+  //   PERIOD
   //   DECIMAL(p,s) → NUMERIC(p,s)
   // DECIMAL args must be integers (no sign, no dot, no leading zeros);
   // s ≤ p and p ≥ 1.