chore(deps): pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	OpenSSF
@sap-ai-sdk/ai-api (source)	devDependencies	pin	^2.15.1-20260901012855.0 → 2.15.1-20260901012855.0
@sap-ai-sdk/core (source)	devDependencies	pin	^2.15.1-20260901012855.0 → 2.15.1-20260901012855.0
@sap-ai-sdk/document-grounding (source)	devDependencies	pin	^2.15.1-20260901012855.0 → 2.15.1-20260901012855.0
@sap-ai-sdk/foundation-models (source)	devDependencies	pin	^2.15.1-20260901012855.0 → 2.15.1-20260901012855.0
@sap-ai-sdk/langchain (source)	devDependencies	pin	^2.15.1-20260901012855.0 → 2.15.1-20260901012855.0
@sap-ai-sdk/llm-batch (source)	devDependencies	pin	^2.15.1-20260901012855.0 → 2.15.1-20260901012855.0
@sap-ai-sdk/openai (source)	devDependencies	pin	^2.15.1-20260901012855.0 → 2.15.1-20260901012855.0
@sap-ai-sdk/orchestration (source)	devDependencies	pin	^2.15.1-20260901012855.0 → 2.15.1-20260901012855.0
@sap-ai-sdk/rpt (source)	devDependencies	pin	^2.15.1-20260901012855.0 → 2.15.1-20260901012855.0

⚠️ Renovate's lock file maintenance/replacement/pin functionality does not support validating Minimum Release Age, as the package manager performs the required changes to update package(s). Confirm whether your package manager perform its own validation for the Minimum Release Age of packages.

Add the preset :preserveSemverRanges to your config if you don't want to pin your dependencies.

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