Rewrite 548 skill descriptions to the activation rubric

Each rewritten description now states both what the skill does (concrete
capability, named tools/artifacts) and an explicit when-to-use trigger,
improving agent discovery/activation. Grounded in each skill's own body;
changes confined to the `description` field only (bodies and all other
frontmatter untouched). Produced by a gated audit->rewrite->recheck loop
(548 -> 0 flagged) with a sampled anti-invention check (0 ungrounded).

Schema: 817/817 pass. Framework-ID gate: 0 defects.

skills/implementing-log-forwarding-with-fluentd/SKILL.md

@@ -1,7 +1,12 @@
 ---
 name: implementing-log-forwarding-with-fluentd
-description: Configure Fluentd and Fluent Bit for centralized log aggregation, routing,
-  filtering, and enrichment across distributed infrastructure
+description: >-
+  Configures Fluent Bit as an endpoint log forwarder and Fluentd as the central
+  aggregator for centralized log collection, routing, filtering, and enrichment,
+  covering input plugins for syslog/file-tailing/application logs and output
+  routing to Elasticsearch, S3, and Splunk. Use when setting up centralized log
+  aggregation across distributed infrastructure or generating Fluent Bit/Fluentd
+  configuration files for a new log pipeline.
 domain: cybersecurity
 subdomain: security-operations
 tags: