cli: --min-age is replication lag

Author: sirupsen

README.md

@@ -185,7 +185,7 @@ Options:
   - `-v` or `--verbose` - Print extra info
   - `-i` or `--interactive` - Confirm queries, implies `--debug`
   - `--json` - Print JSONL output for machine readability
-  - `--min-age` - Considers only rows older than specified.
+  - `--min-age` - Considers only rows older than specified. Useful for specifying replication lag.
                   Example: `--min-age=5min` ignores rows from the last 5 minutes.
                   Valid units: `d, days, h, hours, min, minutes, mon, months, s, seconds, w, weeks, y, years`
   - `--max-age` - Considers only rows younger than specified. See `--min-age`.

data_diff/__main__.py

@@ -44,7 +44,7 @@
 @click.option(
     "--min-age",
     default=None,
-    help="Considers only rows older than specified. "
+    help="Considers only rows older than specified. Useful for specifying replication lag."
     "Example: --min-age=5min ignores rows from the last 5 minutes. "
     f"\nValid units: {UNITS_STR}",
 )