Refactor code structure for improved readability and maintainability; optimize performance in key functions.

etc/concelier.yaml.sample

@@ -117,24 +117,38 @@ mirror:
       requireAuthentication: false
       maxDownloadRequestsPerHour: 1200
 
-sources:
-  ghsa:
-    apiToken: "${GITHUB_PAT}"
-    pageSize: 50
-    maxPagesPerFetch: 5
-    requestDelay: "00:00:00.200"
-    failureBackoff: "00:05:00"
-    rateLimitWarningThreshold: 500
-    secondaryRateLimitBackoff: "00:02:00"
-  cve:
-    baseEndpoint: "https://cveawg.mitre.org/api/"
-    apiOrg: ""
-    apiUser: ""
-    apiKey: ""
-    # Optional mirror used when credentials are unavailable.
-    seedDirectory: "./seed-data/cve"
-    pageSize: 200
-    maxPagesPerFetch: 5
-    initialBackfill: "30.00:00:00"
-    requestDelay: "00:00:00.250"
-    failureBackoff: "00:10:00"
+concelier:
+  sources:
+    ghsa:
+      apiToken: "${GITHUB_PAT}"
+      pageSize: 50
+      maxPagesPerFetch: 5
+      requestDelay: "00:00:00.200"
+      failureBackoff: "00:05:00"
+      rateLimitWarningThreshold: 500
+      secondaryRateLimitBackoff: "00:02:00"
+    cve:
+      baseEndpoint: "https://cveawg.mitre.org/api/"
+      apiOrg: ""
+      apiUser: ""
+      apiKey: ""
+      # Optional mirror used when credentials are unavailable.
+      seedDirectory: "./seed-data/cve"
+      pageSize: 200
+      maxPagesPerFetch: 5
+      initialBackfill: "30.00:00:00"
+      requestDelay: "00:00:00.250"
+      failureBackoff: "00:10:00"
+    alpine:
+      baseUri: "https://secdb.alpinelinux.org/"
+      releases:
+        - "v3.18"
+        - "v3.19"
+        - "v3.20"
+      repositories:
+        - "main"
+        - "community"
+      maxDocumentsPerFetch: 20
+      fetchTimeout: "00:00:45"
+      requestDelay: "00:00:00"
+      userAgent: "StellaOps.Concelier.Alpine/0.1 (+https://stella-ops.org)"