Add port in HostDBRecord

[masaori335]

To clarify HostDB records by traffic_ctl hostdb status cmd.

Prior to the change, port is one of key to calculate hash. However, HostDBRecord doesn't store it, so in the list of HostDBRecored, it was unclear which entry is which.

New traffic_ctl hostdb status result is below. port and hash_key is the new fields.

$ traffic_ctl hostdb status | jq .
{
  "metadata": {
    "timestamp": "1770159540",
    "version": "Apache Traffic Server - traffic_server - 10.2.0 - (build # 0 on Feb  3 2026 at 14:35:43)"
  },
  "partitions": [
    {
      "id": "53",
      "records": [
        {
          "metadata": {
            "name": "example.com",
            "port": "80", ///< new field
            "type": "ADDR",
            "af_familiy": "AF_INET",
            "failed": "false",
            "ip_timestamp": "1770159530936784",
            "hash_key": "1577356654191421173" ///< new field
          },
          "info": [
            {
              "ip": "127.0.0.1",
              "health": {
                "last_failure": "0",
                "fail_count": "0"
              }
            }
          ]
        }
      ]
    },
    {
      "id": "59",
      "records": [
        {
          "metadata": {
            "name": "example.com",
            "port": "443", ///< new field
            "type": "ADDR",
            "af_familiy": "AF_INET",
            "failed": "false",
            "ip_timestamp": "1770159532935310",
            "hash_key": "16495443420271430523" ///< new field
          },
          "info": [
            {
              "ip": "127.0.0.1",
              "health": {
                "last_failure": "0",
                "fail_count": "0"
              }
            }
          ]
        }
      ]
    }
  ]
}

[masaori335]

Note: this is duplicated change with in HostDB.cc. However, this avoids issue with ld. #12851

[Copilot]

Pull request overview

This PR adds port number tracking to HostDBRecord to improve the clarity of traffic_ctl hostdb status output. Since port is part of the hash key calculation but wasn't previously stored in the record, it was unclear which entry corresponded to which port in the output.

Changes:

• Added _port field to HostDBRecord class to store the port number
• Updated HostDBRecord::alloc() signature to accept port parameter
• Enhanced JSON output with "port" and "hash_key" fields for better record identification
• Added empty partition filtering to avoid outputting empty partitions in JSON

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
include/iocore/hostdb/HostDBProcessor.h	Added _port private field, port() getter method, and updated alloc() signature with port parameter
src/iocore/hostdb/HostDB.cc	Updated alloc() implementation to initialize _port field and modified callsites to pass port values
src/iocore/hostdb/test_HostFile.cc	Updated test version of alloc() to match new signature
src/mgmt/rpc/handlers/hostdb/HostDB.cc	Added port and hash_key to JSON output metadata and added empty partition filtering

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

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[brbzull0]

looks good!