DOC-6304 DOC-6305 DOC-6306 DOC-6308 Client observability docs

[andy-stark-redis]

Don't be deceived by the branch name, the epic for this is actually DOC-6304 :-) node-redis will have support for this soon, but I'll make a separate PR for the docs to merge when it is released.

A few things to consider:

• I've attempted to give a brief flavour of the tracing process, but let me know if you think it's too much or not detailed enough.
• The attribute badges seem like they might be useful to users, but maybe they're intended more as an internal guide for implementation?
• I've added links to the observability docs from a few relevant places, but if you can think of any other pages that should have links then let me know.

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Note

Medium Risk
Medium risk because it adds new Hugo shortcode/template logic plus site-wide conditional JS/CSS loading, which could impact page rendering/build if the JSON/flags or anchors are incorrect.

Overview
Adds a new client observability doc set: an overview page at develop/clients/observability (with tracing primer and metric-group reference) plus client-specific setup guides for go-redis and redis-py, including new local example snippets.

Implements an otel-metric-groups shortcode backed by data/client_obs_metrics.json, with new static/js/otel-metrics.js + static/css/otel-metrics.css to render the metrics/attribute reference in a readable format and provide anchor/copy-link behavior; baseof.html now conditionally loads these assets via a hasOtelMetrics page-store flag.

Updates cross-links to point to the new observability pages (from error-handling logging guidance and Go/Python production-usage pages), and adjusts the Coding patterns index weight to reorder navigation.

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[github-actions]

Staging links:
https://redis.io/docs/staging/DOC-6302-otel-overview/develop/clients/error-handling/
https://redis.io/docs/staging/DOC-6302-otel-overview/develop/clients/go/
https://redis.io/docs/staging/DOC-6302-otel-overview/develop/clients/go/observability/
https://redis.io/docs/staging/DOC-6302-otel-overview/develop/clients/go/produsage/
https://redis.io/docs/staging/DOC-6302-otel-overview/develop/clients/observability/
https://redis.io/docs/staging/DOC-6302-otel-overview/develop/clients/patterns/
https://redis.io/docs/staging/DOC-6302-otel-overview/develop/clients/redis-py/observability/
https://redis.io/docs/staging/DOC-6302-otel-overview/develop/clients/redis-py/produsage/

[github-actions]

DOC-6302

[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[dwdougherty]

Just one nitpick.