Import upstream v0.16.22, stripped

Upstream commit: 474dd0229cb20cf513036619781ed97bd8073c3f
Enterprise-only files removed or emptied: 63
Enterprise-only snippets removed: 117 in 50 files
Dangling module declarations removed: 5
Cargo edits turning enterprise off: 14
Verification: clean
Enterprise feature gates left for rebuilt features: 19 in 18 files

Produced by tools/fork/strip.py. The full report is in docs/fork/strip-reports/ on main.

tests/resources/smtp/antispam/llm.test

@@ -0,0 +1,72 @@
+expect LLM_UNSOLICITED_HIGH
+
+Subject: Unsolicited,High,Test
+
+Test
+
+<!-- NEXT TEST -->
+expect LLM_COMMERCIAL_HIGH
+
+Subject: Commercial,High,Test
+
+Test
+<!-- NEXT TEST -->
+expect LLM_HARMFUL_HIGH
+
+Subject: Harmful,High,Test
+
+Test
+<!-- NEXT TEST -->
+expect LLM_LEGITIMATE_HIGH
+
+Subject: Legitimate,High,Test
+
+Test
+<!-- NEXT TEST -->
+expect LLM_UNSOLICITED_MEDIUM
+
+Subject: Unsolicited,Medium,Test
+
+Test
+<!-- NEXT TEST -->
+expect LLM_COMMERCIAL_MEDIUM
+
+Subject: Commercial,Medium,Test
+
+Test
+<!-- NEXT TEST -->
+expect LLM_HARMFUL_MEDIUM
+
+Subject: Harmful,Medium,Test
+
+Test
+<!-- NEXT TEST -->
+expect LLM_LEGITIMATE_MEDIUM
+
+Subject: Legitimate,Medium,Test
+
+Test
+<!-- NEXT TEST -->
+expect LLM_UNSOLICITED_LOW
+
+Subject: Unsolicited,Low,Test
+
+Test
+<!-- NEXT TEST -->
+expect LLM_COMMERCIAL_LOW
+
+Subject: Commercial,Low,Test
+
+Test
+<!-- NEXT TEST -->
+expect LLM_HARMFUL_LOW
+
+Subject: Harmful,Low,Test
+
+Test
+<!-- NEXT TEST -->
+expect LLM_LEGITIMATE_LOW
+
+Subject: Legitimate,Low,Test
+
+Test