story-kit: create 100_story_test_coverage_http_context_rs_to_100

.story_kit/work/1_upcoming/100_story_test_coverage_http_context_rs_to_100.md

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+---
+name: "Test Coverage: http/context.rs to 100%"
+---
+
+# Story 100: Test Coverage: http/context.rs to 100%
+
+## User Story
+
+As a developer, I want http/context.rs to have 100% test coverage, so that regressions in AppContext helper methods are caught early.
+
+## Acceptance Criteria
+
+- [ ] server/src/http/context.rs reaches 100% line coverage (3 missing lines covered)
+- [ ] cargo clippy passes with no warnings
+- [ ] cargo test passes with all tests green
+- [ ] No changes to production code, only test code added
+
+## Out of Scope
+
+- TBD