Kheiss/qa review2

[kheiss-uwzoo]

Branch: kheiss/qa-review2
Purpose: Address open documentation bugs: prerequisite and URL corrections, Support Matrix and VLM link fixes, and MkDocs build/link fixes.

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Summary

This PR addresses documentation bugs in the extraction docs and MkDocs setup:

1. “Addressing open documentation bugs” (commit 317e7cf) — Prerequisites (Python 3.12+), Support Matrix URL and embedding model name, quickstart venv/MIG link fixes, VLM overview link.
2. MkDocs build and link fixes — Remove invalid nav entry, fix broken links and anchors so mkdocs build completes cleanly.

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1. Addressing open documentation bugs (commit 317e7cf)

• docs/docs/extraction/audio.md — Corrected RIVA Support Matrix URL to support-matrix/support-matrix.html.
• docs/docs/extraction/prerequisites.md — Added Python 3.12+ to software requirements; clarified note that Python must be installed before creating the environment and that 3.10/3.11 cause dependency resolution failures.
• docs/docs/extraction/quickstart-guide.md — Added Python 3.12+ requirement before venv commands; updated tip from Conda to virtual environment; fixed MIG raw.githubusercontent link (removed errant character).
• docs/docs/extraction/support-matrix.md — Added “Software Requirements” section with Python 3.12+; updated embedding model name from llama3.2-nv-embedqa-1b-v2 to llama-nemotron-embed-1b-v2.
• docs/docs/extraction/vlm-embed.md — Fixed NeMo Retriever Library link from external search URL to overview.md.

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2. MkDocs build and link fixes

• Navigation (docs/mkdocs.yml): Removed invalid nav entry API Reference: extraction/api-docs (path does not exist).
  Optional (Bug 5966354): If merging nav fixes for CLI/API reference pages, ensure “Use the CLI” → extraction/cli-reference.md and “Use the API” → extraction/python-api-reference.md, with redirects from nv-ingest_cli.md and nv-ingest-python-api.md (may already be present in your working tree).
• Links: In user-defined-functions.md, replaced broken relative link to config/default_pipeline.yaml with a GitHub URL. In content-metadata.md, added explicit fragment IDs for in-page anchors (#nearbyobjectsschema, #errormetadataschema, #infomessagemetadataschema).
• Result: mkdocs build -f docs/mkdocs.yml completes without the reported nav/link warnings.

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Files changed

Area	Files
Docs (extraction)	audio.md, prerequisites.md, quickstart-guide.md, support-matrix.md, vlm-embed.md
Docs (config)	mkdocs.yml (nav/redirects as noted above)