Add #rss command family with LLM tags and summaries (v0.20.0)

#rss subcommands on the command channel: help / add <url> <name> /
remove <name> / tags / sources / get <name|#tag>. Sources are stored in
a new rss_sources table in the existing MESH_DB_PATH file (second
node:sqlite connection, case-insensitive names); feeds parsed with
fast-xml-parser (RSS 2.0 + Atom); AI tags and headline summaries via
injected LlmService.chat() with bounded maxTokens (50/200).

CommandService gains prefix registration so one handler owns the whole
#rss family while #ping stays an exact match; wired in CommandModule's
factory — still no constructor-level cycle, no forwardRef. One dead feed
does not sink a tag summary.

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "mesh-bot",
-  "version": "0.11.3",
+  "version": "0.19.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mesh-bot",
-      "version": "0.11.3",
+      "version": "0.19.0",
       "license": "UNLICENSED",
       "dependencies": {
         "@bufbuild/protobuf": "^2.15.0",
@@ -18,6 +18,7 @@
         "@nestjs/schedule": "^12.0.2",
         "@nestjs/swagger": "^12.0.2",
         "@scalar/nestjs-api-reference": "^1.2.21",
+        "fast-xml-parser": "^5.11.1",
         "reflect-metadata": "^0.2.2",
         "rxjs": "^7.8.1"
       },
@@ -1148,6 +1149,18 @@
         "url": "https://paulmillr.com/funding/"
       }
     },
+    "node_modules/@nodable/entities": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/@nodable/entities/-/entities-3.0.0.tgz",
+      "integrity": "sha512-8L9xFeTYKhm49xfIypoe2W5wV1m/3Z58kT+7kR9A8OyFxcPduI4VmxaUMQyKYrRjUoLLSXv6EKKID5Tvj9cUVw==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/nodable"
+        }
+      ],
+      "license": "MIT"
+    },
     "node_modules/@oxc-project/types": {
       "version": "0.151.0",
       "resolved": "https://registry.npmjs.org/@oxc-project/types/-/types-0.151.0.tgz",
@@ -2336,6 +2349,18 @@
         "node": ">=14"
       }
     },
+    "node_modules/anynum": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/anynum/-/anynum-1.0.1.tgz",
+      "integrity": "sha512-N6//FLET/tXYNM/F6ABca1oH6fWB+KlTt909Le28WMDBk8oaT4vY17DCrwg2MvmuqUKt3Ni4N5dGJ/EoBgcO6A==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT"
+    },
     "node_modules/append-field": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/append-field/-/append-field-1.0.0.tgz",
@@ -3279,6 +3304,45 @@
         "fast-string-width": "^3.0.2"
       }
     },
+    "node_modules/fast-xml-builder": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/fast-xml-builder/-/fast-xml-builder-1.3.1.tgz",
+      "integrity": "sha512-pIM/1n3ntFXKYrUZwW7QCK0gAW7XY+wzj1YMIV3tLDvPj/V+zTGJK5e3/4WJfwj0qWw2ElNXiTixda/R+3YSug==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "path-expression-matcher": "^1.6.2",
+        "xml-naming": "^0.3.0"
+      }
+    },
+    "node_modules/fast-xml-parser": {
+      "version": "5.11.1",
+      "resolved": "https://registry.npmjs.org/fast-xml-parser/-/fast-xml-parser-5.11.1.tgz",
+      "integrity": "sha512-TBw6K/fxoQGGjCmZDw9w/ZwP3uDcnTM4YH/g+PFRWr8sbe5idXtxNN6vITh4+1ruCZaho6uBFurElsA7F0zzgw==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "@nodable/entities": "^3.0.0",
+        "fast-xml-builder": "^1.2.0",
+        "is-unsafe": "^2.0.0",
+        "path-expression-matcher": "^1.6.2",
+        "strnum": "^2.4.2",
+        "xml-naming": "^0.3.0"
+      },
+      "bin": {
+        "fxparser": "src/cli/cli.js"
+      }
+    },
     "node_modules/fdir": {
       "version": "6.5.0",
       "resolved": "https://registry.npmjs.org/fdir/-/fdir-6.5.0.tgz",
@@ -3830,6 +3894,18 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/is-unsafe": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/is-unsafe/-/is-unsafe-2.0.2.tgz",
+      "integrity": "sha512-HgbIHPBH0KHHCcjLfGsCvhtPTVxjaAZlXjwdz7/GQC40SjSe4sfQsar8J5VFo8JOSbarkpV0OLG95bbaNd9aAQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT"
+    },
     "node_modules/isexe": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/isexe/-/isexe-2.0.0.tgz",
@@ -4848,6 +4924,21 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/path-expression-matcher": {
+      "version": "1.6.2",
+      "resolved": "https://registry.npmjs.org/path-expression-matcher/-/path-expression-matcher-1.6.2.tgz",
+      "integrity": "sha512-enSlaiat05iasnzmgNxRj8reFdj3puY2QpNgP1aPIaVfT6nn9ICuPoFlKHk8EN22HcwewshO+mN2DGbkCEOtqQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/path-key": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
@@ -5503,6 +5594,21 @@
         "node": ">=4"
       }
     },
+    "node_modules/strnum": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/strnum/-/strnum-2.4.2.tgz",
+      "integrity": "sha512-rDG3Ah4TV0k1hWvLSzkZtMmLN9+eS+h3knq4MP6A42Y3Yh5qGNnOUs1jJkoSr8FG5dsL28c7KgkIBzSEykqtuw==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "anynum": "^1.0.1"
+      }
+    },
     "node_modules/strtok3": {
       "version": "10.3.5",
       "resolved": "https://registry.npmjs.org/strtok3/-/strtok3-10.3.5.tgz",
@@ -6147,6 +6253,21 @@
       "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
       "license": "ISC"
     },
+    "node_modules/xml-naming": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/xml-naming/-/xml-naming-0.3.0.tgz",
+      "integrity": "sha512-ghig2TBE/H11aOVgmahA3MhimvkBr6JIYknH/Dhdk10nXwdbIqBJsbfMxpvFPG8bAw77gN29aQWvKpmVoPlvPQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=16.0.0"
+      }
+    },
     "node_modules/yoctocolors": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/yoctocolors/-/yoctocolors-2.2.0.tgz",