fix: support wildcard filtering in EC2 filters

[kapoorp99]

Add wildcard pattern matching support to EC2 filter values to match AWS behavior.

Changes:

• Added wildcardToRegex() method to convert AWS wildcard patterns (* and ?) to Java regex
• Added matchesValue() method for pattern-based value matching
• Updated all filter matching logic to use wildcard patterns instead of exact string matching
• Supports wildcard filtering for all filter types: tag filters, tag-key, tag-value, and resource-specific filters
• Applies to all EC2 resources: VPCs, Subnets, Security Groups, Instances, Internet Gateways, Route Tables, Volumes

Added comprehensive integration tests:

• describeVpcsWithWildcardTagFilter: Tests asterisk wildcard patterns
• describeVpcsWithWildcardQuestionMark: Tests question mark wildcard patterns

All 69 EC2 integration tests pass. Backward compatible with exact string matching.

Fixes #830

[Copilot]

Pull request overview

This PR adds AWS-style wildcard matching for EC2 filter values, addressing wildcard tag filtering behavior for DescribeVpcs and applying the shared filter matching path across EC2 resources.

Changes:

• Adds wildcard-to-regex matching for EC2 filter values.
• Replaces exact contains checks with pattern-based matching across supported EC2 filters.
• Adds integration coverage for VPC tag filters using * and ? wildcards.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/main/java/io/github/hectorvent/floci/services/ec2/Ec2Service.java	Implements wildcard-aware EC2 filter matching.
src/test/java/io/github/hectorvent/floci/services/ec2/Ec2IntegrationTest.java	Adds integration tests for wildcard VPC tag filtering.

Comments suppressed due to low confidence (1)

src/main/java/io/github/hectorvent/floci/services/ec2/Ec2Service.java:1226

• EC2 filter wildcards can be escaped with a backslash to match literal * and ?, but this conversion treats \ as a literal regex backslash and still expands the following wildcard. That makes filters such as Value=foo\*bar match foo\anythingbar instead of a tag value of foo*bar, which diverges from AWS wildcard filtering. Consume the escaped character and quote it as a literal before applying wildcard expansion.

        }

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

[hectorvent]

Thanks @kapoorp99,

This is a great addition to Floci.