chore(gateway): align config_schema.json with config DTOs

[irvingouj@Devolutions (irvingoujAtDevolution)]

The hand-maintained config_schema.json had drifted from the config.rs dto module; this re-syncs it attribute-by-attribute (Rust is the source of truth, no Rust changes). It adds missing surfaces (TlsVerifyStrict, MinRecordingStorageFreeSpace, JobQueueDatabase, TrafficAuditDatabase, AgentTunnel, and __debug__'s ws_keep_alive_interval/kerberos with the Kerberos type tree), fixes the ngrok tunnel discriminator (proto → Proto, matching #[serde(tag = "Proto")]), and drops the incorrect Listeners root requirement (the field has #[serde(default)]). It also corrects the AI provider keys to the names serde actually emits — Lmstudio/Openai/Openrouter/AzureOpenai — since rename_all = "PascalCase" only capitalizes the first letter of each _-separated segment; note these awkward keys come from the Rust field names (openai, azure_openai, …), so if OpenAi/AzureOpenAi are the intended config keys that should be a separate Rust-side #[serde(rename)] fix.

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[Copilot]

Pull request overview

This PR re-syncs the hand-maintained config_schema.json with the Rust config.rs DTOs so that schema validation and documentation match the config that serde actually parses/serializes (without changing any Rust code).

Changes:

• Added missing top-level and definition surfaces (e.g., TlsVerifyStrict, MinRecordingStorageFreeSpace, JobQueueDatabase, TrafficAuditDatabase, AgentTunnel, and Kerberos / ws_keep_alive_interval under __debug__).
• Fixed schema discriminators/keys to match serde output (e.g., ngrok tunnel tag key Proto, AI provider keys like Lmstudio / Openai / Openrouter / AzureOpenai).
• Dropped the incorrect root requirement for Listeners (since the DTO uses #[serde(default)]).

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.