Simplify bundle JSON schema annotation system

Read OpenAPI descriptions directly from the spec at runtime instead of
pre-extracting them into annotation YAML files. This makes the OpenAPI
spec a requirement for schema generation and eliminates annotation files
that flip-flopped on every SDK bump.

Changes:
- Remove annotations_openapi.yml and annotations_openapi_overrides.yml
- Merge manual overrides into a single annotations.yml
- Use bundle paths (e.g. resources.jobs.*) as annotation keys instead
  of Go type paths
- Add path_mapping.go to resolve bundle paths to Go types via reflection
- Remove bundle/docsgen (was the only other consumer of annotations)
- Makefile schema targets now require DATABRICKS_OPENAPI_SPEC

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: shreyas-goenka

Makefile

@@ -130,14 +130,11 @@ snapshot:
 snapshot-release:
 	goreleaser release --clean --skip docker --snapshot
 
-schema:
-	go run ./bundle/internal/schema ./bundle/internal/schema ./bundle/schema/jsonschema.json
+schema: .codegen/openapi.json
+	DATABRICKS_OPENAPI_SPEC=.codegen/openapi.json go run ./bundle/internal/schema ./bundle/internal/schema ./bundle/schema/jsonschema.json
 
-schema-for-docs:
-	go run ./bundle/internal/schema ./bundle/internal/schema ./bundle/schema/jsonschema_for_docs.json --docs
-
-docs:
-	go run ./bundle/docsgen ./bundle/internal/schema ./bundle/docsgen
+schema-for-docs: .codegen/openapi.json
+	DATABRICKS_OPENAPI_SPEC=.codegen/openapi.json go run ./bundle/internal/schema ./bundle/internal/schema ./bundle/schema/jsonschema_for_docs.json --docs
 
 INTEGRATION = go run -modfile=tools/go.mod ./tools/testrunner/main.go ${GO_TOOL} gotestsum --format github-actions --rerun-fails --jsonfile output.json --packages "./acceptance ./integration/..." -- -parallel 4 -timeout=2h
 
@@ -202,7 +199,7 @@ bundle/direct/dresources/apitypes.generated.yml: ./bundle/direct/tools/generate_
 bundle/direct/dresources/resources.generated.yml: ./bundle/direct/tools/generate_resources.py .codegen/openapi.json bundle/direct/dresources/apitypes.generated.yml bundle/direct/dresources/apitypes.yml acceptance/bundle/refschema/out.fields.txt
 	python3 $^ > $@
 
-.PHONY: lint lintfull tidy lintcheck fmt fmtfull test test-unit test-acc test-slow test-slow-unit test-slow-acc cover showcover build snapshot snapshot-release schema schema-for-docs integration integration-short acc-cover acc-showcover docs ws wsfix links checks test-update test-update-templates generate-out-test-toml test-update-aws test-update-all generate-validation
+.PHONY: lint lintfull tidy lintcheck fmt fmtfull test test-unit test-acc test-slow test-slow-unit test-slow-acc cover showcover build snapshot snapshot-release schema schema-for-docs integration integration-short acc-cover acc-showcover ws wsfix links checks test-update test-update-templates generate-out-test-toml test-update-aws test-update-all generate-validation
 
 test-exp-aitools:
 	make test TEST_PACKAGES="./experimental/aitools/..." ACCEPTANCE_TEST_FILTER="TestAccept/apps"