fix(cicd): chunk bot messages on character boundaries (#5882) #4026

Job	Run time
changes	6s
test-dbt-versions (1.3)	1m 38s
test-dbt-versions (1.4)	1m 32s
test-dbt-versions (1.8)	1m 44s
test-dbt-versions (1.10)	1m 49s
test-dbt-versions (1.7)	1m 44s
test-dbt-versions (1.5)	1m 39s
test-dbt-versions (1.6)	1m 38s
test-dbt-versions (1.9)	1m 52s
test-vscode	-1s
test-vscode-e2e	-7s
doc-tests	29s
migration-test	1m 27s
ui-test	1m 25s
cicd-tests-windows	10m 33s
style-and-cicd-tests (3.9)	24m 15s
style-and-cicd-tests (3.11)	22m 35s
style-and-cicd-tests (3.10)	19m 44s
style-and-cicd-tests (3.13)	18m 33s
engine-tests-docker (clickhouse)	2m 54s
style-and-cicd-tests (3.12)	25m 50s
engine-tests-docker (trino)	8m 17s
engine-tests-docker (postgres)	2m 25s
engine-tests-docker (starrocks)	2m 37s
engine-tests-docker (duckdb)	1m 31s
engine-tests-docker (risingwave)	2m 41s
engine-tests-docker (mssql)	2m 13s
engine-tests-docker (mysql)	1m 42s
engine-tests-docker (spark)	5m 52s
ui-style	0s
engine-tests-cloud (clickhouse-cloud)	11m 21s
engine-tests-cloud (databricks)	16m 16s
engine-tests-cloud (bigquery)	15m 7s
engine-tests-cloud (fabric)	5m 8s
engine-tests-cloud (redshift)	12m 28s
engine-tests-cloud (athena)	22m 49s
engine-tests-cloud (gcp-postgres)	4m 33s
engine-tests-cloud (snowflake)	16m 5s
	4h 32m 24s

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