Add Claude Code AI memory files

AI context/memory from Claude Code sessions covering all
infrastructure: JARVIS, NovaCPX, DO sites, Proxmox, FusionPBX,
MediaStack, and project feedback/preferences.

ai-memory/feedback_mysql_collation.md

@@ -0,0 +1,17 @@
+---
+name: feedback-mysql-collation
+description: Always use utf8mb4_unicode_ci for new tables — mixing collations breaks JOINs with MySQL error 1267
+metadata:
+  type: feedback
+  originSessionId: 002fe81e-7e03-414d-b842-1f94f1390a22
+---
+
+All new tables in these MySQL databases must use `utf8mb4_unicode_ci` collation. Never use `utf8mb4_general_ci` or leave it at the server default without checking.
+
+**Why:** Mixing `utf8mb4_general_ci` and `utf8mb4_unicode_ci` in a JOIN causes MySQL error 1267: "Illegal mix of collations." This silently broke wishlist.php and reviews.php on tomsjavajive.com — pages returned 500 with no visible error until a diagnostic script revealed the PDO exception. Fixed by running `ALTER TABLE x CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci` on the mismatched tables.
+
+**How to apply:**
+- When writing `CREATE TABLE`, always include `COLLATE utf8mb4_unicode_ci`
+- When checking an existing table: `SHOW CREATE TABLE tablename\G` — look at the COLLATE line
+- Fix a bad table: `ALTER TABLE tablename CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci`
+- Affected tables on tomsjavajive.com that were wrong (now fixed): wishlist, loyalty_transactions, loyalty_tiers, product_types, loyalty_settings