feat: SQLite ADO.NET implementation of IIdempotencyStore

[Copilot]

Adds a SQLite-backed IIdempotencyStore using Microsoft.Data.Sqlite, enabling idempotency enforcement in embedded, edge, and test scenarios without a full database server.

Core Implementation

• SQLiteIdempotencyKeyRepository — implements IIdempotencyKeyRepository with:
  • SELECT 1 … LIMIT 1 for existence checks, with optional CreatedAt >= @validFrom TTL filtering
  • INSERT OR IGNORE for duplicate-safe inserts
  • DateTimeOffset stored as ISO-8601 text ("O" format) for correct lexicographic ordering
  • WAL mode applied per-connection when EnableWalMode = true
• Scripts/002_CreateIdempotencyKeyTable.sql — CREATE TABLE IF NOT EXISTS with TEXT NOT NULL PRIMARY KEY on IdempotencyKey and an index on CreatedAt for TTL queries
• SQLiteIdempotencyMediatorBuilderExtensions — three AddSQLiteIdempotencyStore overloads (string, factory, action) registering IIdempotencyKeyRepository as Scoped; mirrors SqlServerIdempotencyMediatorBuilderExtensions

Options

Added EnableWalMode to the shared IdempotencyKeyOptions (consistent with how OutboxOptions exposes the same property).

Integration Tests

• SQLiteAdoNetIdempotencyInitializer — creates the idempotency table inline via SqliteConnection and wires up AddSQLiteIdempotencyStore
• SQLiteAdoNetIdempotencyTests — inherits all scenarios from IdempotencyTestsBase: key exists/absent, TTL within range, TTL expired, multiple keys, duplicate insert (same scope), cross-scope duplicate insert

Usage

services.AddPulse(config => config
    .AddSQLiteIdempotencyStore("Data Source=idempotency.db", opts =>
    {
        opts.TableName = "IdempotencyKey";
        opts.TimeToLive = TimeSpan.FromHours(24);
        opts.EnableWalMode = true;
    })
);

[codecov]

Codecov Report

❌ Patch coverage is 97.56098% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.33%. Comparing base (91e59c9) to head (104c34d).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...Lite/Idempotency/SQLiteIdempotencyKeyRepository.cs	98.11%	1 Missing ⚠️
...Lite/SQLiteIdempotencyMediatorBuilderExtensions.cs	96.29%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #382      +/-   ##
==========================================
+ Coverage   91.04%   91.33%   +0.29%     
==========================================
  Files         119      122       +3     
  Lines        4130     4212      +82     
  Branches      375      381       +6     
==========================================
+ Hits         3760     3847      +87     
+ Misses        264      258       -6     
- Partials      106      107       +1     

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[samtrion]

@copilot Add Integration tests

[Copilot]

@copilot Add Integration tests

Added in commit 104c34d:

• SQLiteAdoNetIdempotencyInitializer — creates the idempotency table inline (same pattern as SQLiteAdoNetOutboxInitializer) and wires up AddSQLiteIdempotencyStore
• SQLiteAdoNetIdempotencyTests — inherits all 8 tests from IdempotencyTestsBase: key exists/absent, TTL within range, TTL expired, multiple keys, duplicate insert (same scope), cross-scope duplicate insert, and the full options wiring

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• 1.0.17.172.in-addr.arpa
  • Triggering command: /usr/sbin/mysqld mysqld -container-port 1433 -use-listen-fd conf�� 9c28130c6673ef42487c1462e82110c2719 k/pulse/pulse/.e/run/containerd/io.containerd.runtime.v2.task/moby/a5fde79629ebb345b136b496b8922.process.env += [ "SSL_CERT_DIR=/etc/ssl/certs", "SS--log etc/ssl/certs/ca-certificates.crt", "REQUESTS_CA_BUNDLE=/etc/ssl/certs/ca-certifi 8227e5535ab04c3785c0181061e577b2144/log.json (dns block)
  • Triggering command: /usr/sbin/mysqld mysqld 0/0 --dport 32779 -j DNAT --to-destination 172.17.0.13:1433 5119575ee0dcd981051a1606c1a29e2a462/log.json -i docker0 k/pulse/pulse/sr/var/run/docker/runtime-runc/moby conf�� e21e1c3f9920f0d6/run/containerd/io.containerd.runtime.v2.task/moby/641f4d66b751ca12aad9d8f833524grep } ker/docker-init ns/template.edit/usr/sbin/iptables all("session") a--wait 1c8/log.json ker/docker-init (dns block)
  • Triggering command: /usr/sbin/mysqld mysqld -container-port 1433 -use-listen-fd 2f0b.pid 169abf30c1c24d39 ntime.v2.task/moby/d29d866c2512b2b99726d3ca01e337470aa57d65faae441d3576fbfb04d07179 /snap/bin/git 8227e5535ab04c3785c0181061e577b2144/log.json 0aa57d65faae441d/usr/bin/runc (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)