fix(markdown): preserve multi-dot filenames during resource parsing

[zexuyann]

Description

Fix a resource naming issue in OpenViking add_resource flow when generating filesystem folder names for filenames containing multiple dots.

Previously, Path(...).stem was applied twice during resource name generation. For filenames such as:

access.dns.a_b_c.yaml
access.dns.a_b_d.yaml

the second stem operation incorrectly truncated the semantic suffix, causing generated filesystem folder names to collapse to values such as:

accessdns
accessdns_1

This affected the directory name used when storing parsed resources on disk during the add_resource process.

This change removes the second Path(...).stem call and preserves the already-derived name to ensure stable filesystem folder naming.

Related Issue

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test update

Changes Made

• Remove the second Path(...).stem call in add_resource naming logic
• Preserve semantic filename derived from original resource title
• Fix incorrect filesystem folder name generation for multi-dot filenames

Testing

• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have tested this on the following platforms:
  • Linux
  • macOS
  • Windows

Checklist

• My code follows the project's coding style
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Screenshots (if applicable)

N/A

Additional Notes

Example naming flow after this change:

access.dns.app_a_b_c.yaml
→ access.dns.app_a_b_c
→ accessdnsapp_a_b_c

This ensures consistent filesystem folder naming during add_resource processing.

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