feat(mapper): map Flask blueprint prefixes

[rohitjavvadi]

Summary

Flask route discovery handled route decorators on blueprints, but it did not apply static url_prefix values from either Blueprint(..., url_prefix=...) or app.register_blueprint(..., url_prefix=...). That made common same-file blueprint routes appear at the wrong path in the feature map.

This adds static same-file prefix discovery for Flask blueprints, applies registration prefixes with registration-time precedence, and leaves dynamic prefixes unmodified so the mapper does not guess at runtime values.

Verification

• ./node_modules/.bin/vitest run src/mapper.test.ts
• ./node_modules/.bin/vitest run
• ./node_modules/.bin/tsc -p tsconfig.json --noEmit
• ./node_modules/.bin/oxlint . --config oxlint.json
• ./node_modules/.bin/oxfmt --check src/mappers/python.ts src/mapper.test.ts
• git diff --check
• ./node_modules/.bin/tsc -p tsconfig.build.json

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Clear constructor prefix when registration prefix is dynamic

When register_blueprint(..., url_prefix=...) uses a non-literal value (for example API_PREFIX), parsePythonKeywordStringArg returns null, so this block skips updating the map and leaves any constructor-derived prefix in place. In Flask, registration options override blueprint defaults, so a blueprint defined with url_prefix='/api' but registered with a dynamic prefix will be mapped as /api/... here even though the runtime prefix is different/unknown. This produces incorrect route paths in feature maps for common factory setups that override prefixes at registration time.

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[rohitjavvadi]

Fixed in 5625f6d: dynamic register_blueprint url_prefix values now clear constructor prefixes so unknown runtime mounts no longer emit stale static paths. Also covered None/default fallback and inline-comment literal cases with regressions.