…o feature/system-text-json-v2

The ScopedTermRangeQueryVisitor was a workaround for a specific issue
in Foundatio's query parsing where group node fields were not applied
to term range nodes. The updated Foundatio.Repositories.Elasticsearch
package now handles this behavior correctly, making the custom visitor
redundant.

Also updates GetUserIdentity calls in tests to use ITextSerializer,
aligning with System.Text.Json migration.

- Revert SavedView.SlugPattern/SlugRegex() (out of scope for STJ PR)
- Revert NewSavedView.cs, UpdateSavedView.cs slug regex to original
- Revert SavedViewController.cs to inline regex
- Revert SavedViewControllerTests.cs formatting-only changes
- Revert openapi.json slug pattern change

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

This reverts commit 73bc9ea.

Derive date string from captured DateTimeOffset instead of making a
second independent TimeProvider.GetUtcNow() call that could drift.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Keep the generated Elastic mappings equivalent to origin/main while porting the index configuration to the v8 client APIs.

- Preserve NEST's default float number mapping for usage, usage hour, and billing status fields.

- Preserve the token type byte mapping and the non-indexed request OS copy-to field.

- Use an ordinal comparison when resolving mapped JSON property names.

Tighten STJ object number inference so very large numeric tokens do not throw or truncate when they cannot be represented as Int64.

- Prefer Int32/Int64 where possible, then Decimal, then Double for oversized values.

- Document why application serializer options still set converters even though repository source serialization has its own defaults.

- Cover the oversized-number path with serializer tests.

Update the casing assertions to match the current lower-case underscore contract and remove time-dependent expectations from the event casing tests.

- Assert admin settings serialize base_url, not the old base_u_r_l artifact.

- Use a fixed UTC point in casing tests so expected dates are stable across runs.

Comprehensive integration tests that capture request.json, elastic.json, and
response.json for all critical API endpoints. Output is written to
dogfood-output/{branch}/ for cross-branch comparison.

Covers: event submission (snake_case, PascalCase, camelCase, mixed, typed
values, legacy SDK format, minimal, feature usage, session), plus
organization/project/token/webhook CRUD endpoints.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

fix: add os_name/os_version deserialization aliases for EnvironmentInfo

Older SDKs and snake_case payloads send "os_name" and "os_version" (single
underscore), but the model's [JsonPropertyName] attributes specify "o_s_name"
and "o_s_version" (matching the ES field inferrer's ToLowerUnderscoredWords
output for "OSName"). STJ's PropertyNameCaseInsensitive cannot match these
structurally different strings.

Add private alias properties with [JsonInclude] that accept the alternate form
during deserialization. The aliases use ??= so the canonical form always wins
when both are present. Serialization is unaffected (aliases return null, which
is skipped by DefaultIgnoreCondition.WhenWritingNull).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

test: remove redundant scoped range query coverage

The custom ScopedTermRangeQueryVisitor workaround was removed after updating Foundatio because scoped range query construction is now handled by Foundatio itself.

Keep Exceptionless coverage at the query-rewrite contract level and avoid duplicating Foundatio's low-level query builder behavior here.

Revert "fix: add os_name/os_version deserialization aliases for EnvironmentInfo"

This reverts commit a328df8ccf5c1ad3643bdc379c4f4237cf23d213.

Revert "test: add serialization audit test infrastructure"

This reverts commit fdaee14347fdf748e1af5fc225d7b36a54da92b1.