11950b0a8e
Final themed batch. 5 well-localised correctness fixes. Serialisation precision: - ESG-020: DatabaseGateway.JsonElementToParameterValue probes TryGetInt64 → TryGetDecimal → GetDouble, so a script's high-precision decimal SQL parameter survives the cached-write retry round-trip without silent precision loss. 3 new regression tests. Template engine correctness: - TE-018: DiffService gains ComputeConnectionsDiff over FlattenedConfiguration.Connections, mirroring the existing entity-diff shape and pairing with the Theme 1 TE-017 hash-coverage fix. A ConfigurationDiff record extension in Commons is flagged as a follow-up. - TE-019: TemplateResolver.BuildInheritanceChain now walks via the int? ParentTemplateId directly — only null means "no parent". A real Id of 0 (the prior special-cased sentinel) now walks the chain like any other node, matching the TemplateEngine-013 CycleDetector fix. Regression of TE-013 closed. - TE-020: All 5 Create* paths in TemplateService + SharedScriptService re-ordered to save-first → log-with-real-Id → save-audit (matching the InstanceService pattern). Create* audit rows no longer carry a literal "0" EntityId. Doc deferral: - Transport-012: Component-Transport.md §Audit Trail now spells out that the BundleImportId repository filter IS wired (in CentralUiRepository), but the Audit-Log-Viewer UI dropdown + summary-row hyperlink are a deferred CentralUI follow-up. CLI workaround documented (audit query --bundle-import-id). 11+ new regression tests (3 ESG, 4 DiffService, 3 TemplateResolver, 4 TemplateService, 1 SharedScriptService). Build clean; ESG 72/72, TemplateEngine 324/324. README regenerated: 1 pending of 481 total. Session-to-date: 135 of 136 originally-open Theme findings closed across 10 themes in 10 commits.