fix: remove stale publishing triggers from extension-model skill (#1172)

## Summary

- Removes publishing-related trigger phrases ("push extension", "publish
extension", "extension push", "release extension", "bump version",
"publish to registry", "prepare for publishing") from the
`swamp-extension-model` skill description
- These phrases belong exclusively to `swamp-extension-publish` and were
causing ambiguity in trigger routing
- The trigger evals already correctly marked these queries as
`should_trigger: false`, but the description still advertised them
- Checked all other extension skills (vault, datastore, driver, report)
— none have this issue

## Test Plan

- [x] `deno fmt --check` passes
- [x] `deno lint` passes
- [x] `deno run test` passes (4310 tests)
- [x] Verified other extension skills don't have stale publishing
triggers

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: stack72

.claude/skills/swamp-extension-model/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: swamp-extension-model
-description: Create, test, and publish extension models for swamp — define Zod schemas, implement model interfaces, smoke test against live APIs, write manifest.yaml, and push extensions to the registry. Use when creating models, writing manifest.yaml, publishing/pushing extensions, testing extensions, or preparing models for the registry. Covers all extension types (models, vaults, drivers, datastores, reports). Triggers on "create model", "new model type", "custom model", "extension model", "user model", "typescript model", "extend swamp", "build integration", "zod schema", "model plugin", "deno model", "extensions/models", "model development", "implement model", "smoke test", "test extension", "verify model", "test against API", "before push test", "push extension", "publish extension", "extension push", "release extension", "bump version", "publish to registry", "test extension from another repo", "source extension loading", "manifest", "manifest.yaml", "write manifest", "prepare for publishing".
+description: Create, test, and develop extension models for swamp — define Zod schemas, implement model interfaces, smoke test against live APIs, and write manifest.yaml. Use when creating models, writing manifest.yaml, testing extensions, or developing models. Covers all extension types (models, vaults, drivers, datastores, reports). Triggers on "create model", "new model type", "custom model", "extension model", "user model", "typescript model", "extend swamp", "build integration", "zod schema", "model plugin", "deno model", "extensions/models", "model development", "implement model", "smoke test", "test extension", "verify model", "test against API", "before push test", "test extension from another repo", "source extension loading", "manifest", "manifest.yaml", "write manifest".
 ---
 
 # Swamp Extension Model