fix: local AI chat backend wiring and fallback handling#1119

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BenjaminMichaelis wants to merge 11 commits into

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copilot/local-ai-chat-wiring-fix

Commits on May 17, 2026

Fix local AI chat backend wiring and fallback handling
BenjaminMichaelis
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fix: replace unbounded ConcurrentDictionary with MemoryCache (sliding 30min TTL, 500 entry limit)
BenjaminMichaelis
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fix: remove fragile auth test bypasses
BenjaminMichaelis
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fix: validate Postgres connection string, bind EmbeddingRetry from config, remove resilience handler from local AI client
BenjaminMichaelis
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style: remove trailing whitespace from Identity page handlers
BenjaminMichaelis
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test: cover local chat and backend-selection wiring
BenjaminMichaelis
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test: dispose local test HttpClient/HttpResponseMessage objects
BenjaminMichaelis
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fix: harden unavailable/local chat fallback behavior
BenjaminMichaelis
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fix: require https for Azure AI endpoint validation
BenjaminMichaelis
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test: include hcaptcha test token in chat availability tests
BenjaminMichaelis
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fix: update ChatAvailabilityTests to use IntegrationTestBase pattern
BenjaminMichaelis
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