yang: Fix pyang errors in frr-bgp-filter.yang

[y-bharath14]

Fix pyang errors in frr-bgp-filter.yang

frr-bgp-filter.yang:22: error: RFC 8407: 4.8: statement "revision" must have a "reference" substatement
frr-bgp-filter.yang:74: error: RFC 8407: 4.14: statement "augment" must have a "description" substatement
frr-bgp-filter.yang:79: error: RFC 8407: 4.14: statement "leaf" must have a "description" substatement
frr-bgp-filter.yang:87: error: RFC 8407: 4.14: statement "leaf" must have a "description" substatement
frr-bgp-filter.yang:91: error: RFC 8407: 4.14: statement "leaf" must have a "description" substatement
frr-bgp-filter.yang:141: error: RFC 8407: 4.14: statement "leaf" must have a "description" substatement
frr-bgp-filter.yang:149: error: RFC 8407: 4.14: statement "leaf" must have a "description" substatement
frr-bgp-filter.yang:153: error: RFC 8407: 4.14: statement "leaf" must have a "description" substatement
frr-bgp-filter.yang:215: error: RFC 8407: 4.14: statement "leaf" must have a "description" substatement
frr-bgp-filter.yang:223: error: RFC 8407: 4.14: statement "leaf" must have a "description" substatement
frr-bgp-filter.yang:227: error: RFC 8407: 4.14: statement "leaf" must have a "description" substatement
frr-bgp-filter.yang:271: error: RFC 8407: 4.14: statement "leaf-list" must have a "description" substatement
frr-bgp-filter.yang:279: error: RFC 8407: 4.14: statement "leaf-list" must have a "description" substatement
frr-bgp-filter.yang:313: error: RFC 8407: 4.14: statement "leaf" must have a "description" substatement
frr-bgp-filter.yang:317: error: RFC 8407: 4.14: statement "leaf" must have a "description" substatement

[greptile-apps]

Greptile Overview

Greptile Summary

This PR updates yang/frr-bgp-filter.yang to satisfy RFC 8407 style requirements enforced by pyang by adding:

• a reference substatement under the module revision
• description substatements for the augment and a set of leaf / leaf-list nodes that previously lacked descriptions

These changes are documentation/metadata-only within the YANG model and do not alter list keys, types, or augment paths, so the effective schema should remain the same while removing the reported pyang errors.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk.
• Changes are limited to adding missing YANG description/reference substatements to satisfy RFC 8407 checks; no structural schema changes (paths/keys/types) were introduced in the diff reviewed.
• No files require special attention.

Important Files Changed

Filename	Overview
yang/frr-bgp-filter.yang	Adds missing RFC 8407-required substatements (reference on revision; description on augment and several leaves/leaf-lists) without changing the schema structure.

Sequence Diagram

sequenceDiagram
    participant Author as PR Author
    participant YANG as yang/frr-bgp-filter.yang
    participant Pyang as pyang (RFC 8407 checks)

    Author->>YANG: Add missing reference/description substatements
    Pyang->>YANG: Validate revision has reference
    Pyang->>YANG: Validate augment/leaf/leaf-list have description
    Pyang-->>Author: Errors cleared (RFC 8407 compliance)

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[Jafaral]

@Mergifyio backport dev/10.6

[mergify]

backport dev/10.6

✅ Backports have been created

Details

• #20766 yang: Fix pyang errors in frr-bgp-filter.yang (backport #20746) has been created for branch dev/10.6