Context & catalog isolation — ExecContext gains Backend, handlers decoupled from mpr#229

Merged

ako merged 6 commits intomendixlabs:mainfrom

retran:feature/context-isolation

Apr 17, 2026

Commits on Apr 17, 2026

refactor: add Backend/MprPath/SqlMgr/ThemeRegistry/Settings to ExecContext, populate Backend on connect
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refactor: replace e.reader/writer nil checks with ctx.Connected()/ConnectedForWrite()
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refactor: replace e.reader/e.writer with ctx.Backend and e.field with ctx.Field in free functions
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refactor: convert name lookups and theme registry to free functions using ExecContext
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feat: add mock-based handler tests for showEnumerations
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fix: address review feedback — error logging, auto-bind migration, output threading, disconnect ctx cleanup, cache invalidation, theme registry persistence, parallel ctx fields, settings persistenc…
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