chore: update .gitignore and purge MySQL data from tracking

- Replace hand-written gitignore with Go/macOS/VSCode template
- Add data/ to ignore list (MySQL binaries, redo logs, PEM certs)
- Remove data/ from index to stop tracking sensitive files
  (ca-key.pem, client-key.pem, ibdata, binlogs, etc.)

Made-with: Cursor

.gitignore

@@ -1,31 +1,90 @@
-# Binaries
+# File created using '.gitignore Generator' for Visual Studio Code: https://bit.ly/vscode-gig
+# Created by https://www.toptal.com/developers/gitignore/api/go,macos,visualstudiocode
+# Edit at https://www.toptal.com/developers/gitignore?templates=go,macos,visualstudiocode
+
+### Go ###
+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
 *.exe
 *.exe~
 *.dll
 *.so
 *.dylib
-/bin/
-/output/
 
-# Test
+# Test binary, built with `go test -c`
 *.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
 *.out
-coverage.txt
 
-# Dependency
-/vendor/
+# Dependency directories (remove the comment below to include it)
+# vendor/
 
-# IDE
-.idea/
-.vscode/
-*.swp
-*.swo
-*~
+# Go workspace file
+go.work
 
-# OS
+### macOS ###
+# General
 .DS_Store
-Thumbs.db
+.AppleDouble
+.LSOverride
 
-# Env
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### macOS Patch ###
+# iCloud generated files
+*.icloud
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+.ionide
+
+# End of https://www.toptal.com/developers/gitignore/api/go,macos,visualstudiocode
+
+# Custom rules (everything added below won't be overriden by 'Generate .gitignore File' if you use 'Update' option)
+
+# MySQL data directory (contains binaries, certs, and runtime state)
+data/
+
+# Environment and secrets
 .env
-.env.local
+.env.*
+*.pem