rk-roshan-kr opened a new pull request, #74197:
URL: https://github.com/apache/airflow/pull/74197

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   ### Description
   
   Per discussion in #68382 and maintainer feedback on #68700 / #73608 
requesting focused PRs separated by component area, this PR implements port 
range validation specifically for the core FastAPI REST API request datamodel 
(`ConnectionBody`).
   
   The `port` field in `ConnectionBody` enforces `ge=0, le=65535` via Pydantic 
`Field` constraints. This ensures:
   1. `POST /connections` and `PATCH /connections/{connection_id}` reject 
out-of-range port numbers (e.g. negative integers or values above 65535) with 
HTTP 422 Unprocessable Entity.
   2. Valid TCP/UDP ports (0 to 65535) are accepted normally.
   3. Deserialization during worker execution time remains unaffected, 
preventing task runtime failures on existing legacy connections.
   
   Related Issue: #68382
   


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