* Add defineJsonSecret API for structured secret configuration

Implements defineJsonSecret() to store JSON objects in Cloud Secret Manager.
Useful for consolidating related secrets (e.g., API keys, webhooks, client IDs)
into a single secret, reducing costs and improving organization.

Features:
- Automatic JSON parsing with error handling
- Supports object destructuring
- Throws on missing or invalid JSON

Wire protocol changes (backward compatible):
- Added optional format field to ParamSpec/WireParamSpec
- JsonSecretParam.toSpec() returns format: "json" as CLI hint
- Old CLIs ignore unknown fields, new CLIs can enhance UX
- Format is NOT stored in Secret Manager (just in param spec)

* Add changelog entry for defineJsonSecret API

* Add generic type parameter to defineJsonSecret for type safety

* Update src/params/types.ts

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* Update src/params/types.ts

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* nit: doc comments.

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Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

…#1738)

* fix(analytics): validate against incomplete/invalid app_remove events

* refactor(analytics): clean up filtering code

* fix(analytics): check for value field

* feat: Refactor analytics event handler and update CHANGELOG

* reformat changelog.

* nit: remove unncessary comment.

* reword changelog.

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Co-authored-by: Daniel Lee <danielylee@google.com>