feat: add SNMP provider

[onyedikachi-david]

Closes #2112
/claim #2112

📑 Description

Add SNMP provider implementation for receiving SNMP traps and performing SNMP queries. This provider enables Keep to:

• Receive and process SNMP traps from network devices
• Convert SNMP traps to Keep alerts with proper severity mapping
• Perform SNMP GET, GETNEXT, and GETBULK operations
• Support SNMPv1, v2c, and v3 protocols with appropriate authentication

Changes completed:

• Add SnmpProvider class with SNMPv1, v2c, and v3 support
• Implement configuration validation for SNMP authentication
• Add trap receiver with MIB compiler support
• Add support for SNMP query operations (GET, GETNEXT, GETBULK)
• Create comprehensive test suite
• Update dependencies (pysnmp, pysmi)

✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed

ℹ Additional Information

Dependencies Added

• pysnmp (7.1.16)
• pysmi (1.5.9)

Breaking Changes

None

Configuration Example

authentication:
  snmp_version: "v2c"          # Options: v1, v2c, v3
  community_string: "public"
  listen_port: 162

  # SNMPv3 specific (optional)
  username: ""
  auth_protocol: "SHA"         # Options: MD5, SHA
  auth_key: ""
  priv_protocol: "AES"         # Options: DES, AES
  priv_key: ""

  mib_dirs: []                 # Optional: List of directories containing custom MIB files

[vercel]

@onyedikachi-david is attempting to deploy a commit to the KeepHQ Team on Vercel.

A member of the Team first needs to authorize it.

[shahargl]

hey @onyedikachi-david - I'm not sure how this works. how does Keep server listens for the SNMP traps? you didn't add a server

[shahargl]

server should be optional (default false) and not within the provider