Support plv8 stmt.execute; add reset to clear out saved executions.
Add solaragg.agg_messages to collect anomaly info during aggregate processing.
Default "spill" tolerance to 1 hour, to match historical value.
Add more tests.
Default "spill" tolerance to 1 hour, to match historical value.
Tweak data cleansing filtering based on unit test cases; log cleansing messages into new solaragg.agg_messages table rather than stderr log.
Add another test case.
Add comments.