feat(standards): MR-based tag strategy + repository inventory (registry://repos)

Versioning standard now documents the MR flow: bump pyproject.toml/VERSION and promote CHANGELOG in the MR (referencing the version/tag, not a commit id), merge/squash, then tag the resulting commit. Adds the agent-assisted tagging procedure (wait for the go-ahead, find the version-bump commit, tag only it, ask the user to push) to both the reference page and the releasing wiki runbook. Adds the repo inventory (src/repos.json -> mcp/repos.json), the registry://repos resource + list_repos tool, the 15_repository_inventory lib page, and two MCP prompts: compliance (remediate repos) and release (agent tagging).

standards/src/repos.json

@@ -0,0 +1,117 @@
+{
+  "project": "standards",
+  "note": "Machine-readable repository inventory. Mirrors standards/src/lib/15_repository_inventory.md. Read it with the registry://repos resource or the list_repos tool.",
+  "path_convention": "relative to the aetos/ workspace root",
+  "repos": [
+    {
+      "name": "dagpipe",
+      "type": "package",
+      "path": "dagpipe",
+      "version_source": "pyproject.toml",
+      "drone": "python-lib.yaml",
+      "trigger": "tag",
+      "docs": ["lib", "wiki"],
+      "mcp": { "server": "dagpipe", "port": 8006 }
+    },
+    {
+      "name": "doc-forge",
+      "type": "package",
+      "path": "doc-forge",
+      "version_source": "pyproject.toml",
+      "drone": "python-lib.yaml",
+      "trigger": "tag",
+      "docs": ["lib", "wiki"],
+      "mcp": { "server": "docforge", "port": 8001 }
+    },
+    {
+      "name": "hexa",
+      "type": "package",
+      "path": "hexa",
+      "version_source": "pyproject.toml",
+      "drone": "python-lib.yaml",
+      "trigger": "tag",
+      "docs": ["lib", "wiki"],
+      "mcp": { "server": "hexa", "port": 8008 }
+    },
+    {
+      "name": "mail-intake",
+      "type": "package",
+      "path": "mail-intake",
+      "version_source": "pyproject.toml",
+      "drone": "python-lib.yaml",
+      "trigger": "tag",
+      "docs": ["lib", "wiki"],
+      "mcp": { "server": "mail_intake", "port": 8002 }
+    },
+    {
+      "name": "mongo-ops",
+      "type": "package",
+      "path": "mongo-ops",
+      "version_source": "pyproject.toml",
+      "drone": "python-lib.yaml",
+      "trigger": "tag",
+      "docs": ["lib", "wiki"],
+      "mcp": { "server": "mongo_ops", "port": 8007 }
+    },
+    {
+      "name": "omniread",
+      "type": "package",
+      "path": "omniread",
+      "version_source": "pyproject.toml",
+      "drone": "python-lib.yaml",
+      "trigger": "tag",
+      "docs": ["lib", "wiki"],
+      "mcp": { "server": "omniread", "port": 8003 }
+    },
+    {
+      "name": "openapi-first",
+      "type": "package",
+      "path": "openapi-first",
+      "version_source": "pyproject.toml",
+      "drone": "python-lib.yaml",
+      "trigger": "tag",
+      "docs": ["lib", "wiki"],
+      "mcp": { "server": "openapi_first", "port": 8004 }
+    },
+    {
+      "name": "py-jwt",
+      "type": "package",
+      "path": "py-jwt",
+      "version_source": "pyproject.toml",
+      "drone": "python-lib.yaml",
+      "trigger": "tag",
+      "docs": ["lib", "wiki"],
+      "mcp": { "server": "jwtlib", "port": 8005 }
+    },
+    {
+      "name": "auth-server",
+      "type": "service",
+      "path": "auth-server",
+      "version_source": "VERSION",
+      "drone": "service-docker.yaml",
+      "trigger": "tag",
+      "docs": ["api", "lib", "wiki"],
+      "mcp": null
+    },
+    {
+      "name": "docs",
+      "type": "site",
+      "path": "docs",
+      "version_source": "VERSION",
+      "drone": "service-docker.yaml",
+      "trigger": "push",
+      "docs": [],
+      "mcp": null
+    },
+    {
+      "name": "mcp",
+      "type": "site",
+      "path": "mcp",
+      "version_source": "VERSION",
+      "drone": "service-docker.yaml",
+      "trigger": "push",
+      "docs": [],
+      "mcp": null
+    }
+  ]
+}