fix(#2017): grant mcp__plugin_context7_context7__* for plugin-marketplace context7 (8 agents) (#2029)

* fix(#2017: grant mcp__plugin_context7_context7__* for plugin-marketplace context7

The 8 context7-using agents granted only mcp__context7__* (standalone server
form). Claude Code's plugin-marketplace context7 install names tools
mcp__plugin_context7_context7__*, so the grant never matched and every
researcher/planner/executor silently lost doc lookup (fell back to WebSearch).

- 8 agents: add mcp__plugin_context7_context7__* alongside mcp__context7__*.
- scripts/research-profiles.cjs: update the researcher profile tools to match.
- tests/context7-plugin-grant-parity.test.cjs: regression guard — no agent
  grants the standalone form without the plugin form.

Closes #2017

* docs(#2017): backfill changeset pr 2029

scripts/research-profiles.cjs

@@ -24,7 +24,7 @@ const PROFILES = [
       'Researches domain ecosystem before roadmap creation. Produces files in .planning/research/ consumed during roadmap creation. Spawned by /gsd:new-project or /gsd:new-milestone orchestrators.',
     color: 'cyan',
     tools:
-      'Read, Write, Bash, Grep, Glob, Skill, WebSearch, WebFetch, mcp__context7__*, mcp__firecrawl__*, mcp__exa__*, mcp__tavily__*, mcp__ref__*, mcp__jina__*, mcp__perplexity__*',
+      'Read, Write, Bash, Grep, Glob, Skill, WebSearch, WebFetch, mcp__context7__*, mcp__plugin_context7_context7__*, mcp__firecrawl__*, mcp__exa__*, mcp__tavily__*, mcp__ref__*, mcp__jina__*, mcp__perplexity__*',
     requiredIncludes: [
       '@~/.claude/gsd-core/references/research-documentation-lookup.md',
       '@~/.claude/gsd-core/references/research-philosophy.md',
@@ -46,7 +46,7 @@ const PROFILES = [
       'Researches how to implement a phase before planning. Produces RESEARCH.md consumed by gsd-planner. Spawned by /gsd:plan-phase orchestrator.',
     color: 'cyan',
     tools:
-      'Read, Write, Edit, Bash, Grep, Glob, Skill, WebSearch, WebFetch, mcp__context7__*, mcp__firecrawl__*, mcp__exa__*, mcp__tavily__*, mcp__ref__*, mcp__jina__*, mcp__perplexity__*',
+      'Read, Write, Edit, Bash, Grep, Glob, Skill, WebSearch, WebFetch, mcp__context7__*, mcp__plugin_context7_context7__*, mcp__firecrawl__*, mcp__exa__*, mcp__tavily__*, mcp__ref__*, mcp__jina__*, mcp__perplexity__*',
     requiredIncludes: [
       '@~/.claude/gsd-core/references/research-documentation-lookup.md',
       '@~/.claude/gsd-core/references/research-philosophy.md',
@@ -68,7 +68,7 @@ const PROFILES = [
     description:
       'Researches a single gray area decision and returns a structured comparison table with rationale. Spawned by discuss-phase advisor mode.',
     color: 'cyan',
-    tools: 'Read, Bash, Grep, Glob, Skill, WebSearch, WebFetch, mcp__context7__*',
+    tools: 'Read, Bash, Grep, Glob, Skill, WebSearch, WebFetch, mcp__context7__*, mcp__plugin_context7_context7__*',
     requiredIncludes: [
       '@~/.claude/gsd-core/references/research-documentation-lookup.md',
     ],
@@ -84,7 +84,7 @@ const PROFILES = [
       'Researches a chosen AI framework\'s official docs to produce implementation-ready guidance — best practices, syntax, core patterns, and pitfalls distilled for the specific use case. Writes the Framework Quick Reference and Implementation Guidance sections of AI-SPEC.md. Spawned by /gsd:ai-integration-phase orchestrator.',
     color: 'green',
     tools:
-      'Read, Write, Edit, Bash, Grep, Glob, WebFetch, WebSearch, mcp__context7__*',
+      'Read, Write, Edit, Bash, Grep, Glob, WebFetch, WebSearch, mcp__context7__*, mcp__plugin_context7_context7__*',
     requiredIncludes: [
       '@~/.claude/gsd-core/references/research-documentation-lookup.md',
     ],
@@ -101,7 +101,7 @@ const PROFILES = [
       'Researches the business domain and real-world application context of the AI system being built. Surfaces domain expert evaluation criteria, industry-specific failure modes, regulatory context, and what "good" looks like for practitioners in this field — before the eval-planner turns it into measurable rubrics. Spawned by /gsd:ai-integration-phase orchestrator.',
     color: 'purple',
     tools:
-      'Read, Write, Edit, Bash, Grep, Glob, WebSearch, WebFetch, mcp__context7__*',
+      'Read, Write, Edit, Bash, Grep, Glob, WebSearch, WebFetch, mcp__context7__*, mcp__plugin_context7_context7__*',
     requiredIncludes: [
       '@~/.claude/gsd-core/references/research-documentation-lookup.md',
     ],
@@ -117,7 +117,7 @@ const PROFILES = [
       'Produces UI-SPEC.md design contract for frontend phases. Reads upstream artifacts, detects design system state, asks only unanswered questions. Spawned by /gsd:ui-phase orchestrator.',
     color: 'purple',
     tools:
-      'Read, Write, Edit, Bash, Grep, Glob, Skill, WebSearch, WebFetch, mcp__context7__*, mcp__firecrawl__*, mcp__exa__*, mcp__tavily__*, mcp__ref__*, mcp__jina__*',
+      'Read, Write, Edit, Bash, Grep, Glob, Skill, WebSearch, WebFetch, mcp__context7__*, mcp__plugin_context7_context7__*, mcp__firecrawl__*, mcp__exa__*, mcp__tavily__*, mcp__ref__*, mcp__jina__*',
     requiredIncludes: [
       '@~/.claude/gsd-core/references/research-documentation-lookup.md',
     ],